Malicious PDF — malware analysis report

Static analysis result for SHA-256 7452a3b6d22b0412…

MALICIOUS

PDF

100.1 KB Created: 2021-07-08 09:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2aa934d8ec0fb3eaa08ac6978d58afcd SHA-1: 1516c2b9960648583d3ecc0df422449ec3cc08d3 SHA-256: 7452a3b6d22b04127d3557cdd362c4a78c1f4d06f490c801d2689466beddfa8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to numerous external URLs hosted on potentially compromised or disposable domains. The primary purpose appears to be directing users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9371

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://medvor.ru/uplcv?utm_term=soft+aesthetic+bio+template PDF link annotation
    • http://turatabor.hu/media/15315816105.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/e2c96038f3b77bfc14c01a65b7db0653/vunuzeneke.pdfIn PDF document text
    • https://people11people.com/uploads/File/56976693065.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/30803b6936b270552ebef5cdf31f5752/82785731897.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/6ffc66d9cac65295d4823d5918eb5700/pozuwokanevefilijerubanu.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/woxida.pdfIn PDF document text
    • http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kunepevezone.pdfIn PDF document text
    • http://greaterdeliveranceministries1.com/clients/61527/File/vutegadudinabubufupowexe.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c60e766a348---vawij.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/f4b9af725e3660ec91ff638915925adc/20341077633.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9b23bc63a---79123810465.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/btujfjficrni8hsr7plgbl662l/23795893835.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/vanq67v5a1nkaaqbbg7b5kgv62/gobutumazefig.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16099f7fe8fedd---menesitefekorasenusom.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/wirinij.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ae0553683---pedewinesotifidikuvureki.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5becc6c35c---61720169266.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/e83b932b19d6b8950eaa6f5c79b18b5b/guvuwaniratoxasexu.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/rm7juao1eevg1avg8kr5bh0l12/33980506980.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c1aa578de73---vowizebi.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085738bb70b7---29626603854.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/kerinuxife.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/garafupemukepifipap.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/186854256a7df3e411dc4673032867de/saruzuposej.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607823a94c0b9---14497448356.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/nuxatibonozaludomafujezo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32D 25852 bytes
SHA-256: ebc6a4eeb1d522f6f0e83d40fb8325172b27e863f798226d93155f6a25e99e66
font_01_sfnt_off000119b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C2 2204 bytes
SHA-256: 589cb686b403b8c6597ab00c03ff158957065e7483ac9ea86870cd71028d8df2
font_03_sfnt_off00013b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B68 24376 bytes
SHA-256: 52045917ac1003bc2aec9ac16a9f5c69d4b0a402d19f757cbec622ee1f14673f
font_04_sfnt_off00016706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16706 10756 bytes
SHA-256: 32db87504063a544181165ca94deb0744f07b69d91da6e073c7a7ecb202b8478

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