Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ff18f153e82c3b…

MALICIOUS

PDF

82.6 KB Created: 2021-09-02 06:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6f1dbc8a38b10dc91ec5317e4f791848 SHA-1: 96fc906898a99e468e1af9b5843a6c8d6c37ee2e SHA-256: d7ff18f153e82c3b94ff8a81db5aa2c8fc8a7add2c8455aa307189443997e9f3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://aashianarealty.com/file/wexinonasiwobefixuvaselu.pdf In PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/5ebdd3f55b4a4873c2ac08dd5302847b/89248292136.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160728c33c9acf---47282480443.pdfIn PDF document text
    • https://ibericadearmerias.com/file/wipepatosawu.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/35889808294.pdfIn PDF document text
    • http://computerdoki.hu/user/file/17736021782.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/s1rnef1ld8ndo5si362k342fs0/bojudofuzoderazeselezo.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60166397663.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/jexatefenikosixoxibupa.pdfIn PDF document text
    • http://garystrike.com/clients/3/30/301ae0ed988f9237e4cb8f8c41f6cb36/File/firovadame.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082e881f3765---mukewufixitemuzavakosut.pdfIn PDF document text
    • http://tonwen.org/userfiles/file/56723291164.pdfIn PDF document text
    • http://donghotam.com/luutru/files/bodowesuz.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/bovoweresuxudifufitamu.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/161044b62c9610---4361343964.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dde1564968---piloluvokotosixakem.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/jepaderebukepumopixe.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ae74d69fa---88483701060.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/78f8d9abe5479d19e8685237e8605e42/jezadikepidaxazutopiwime.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/bugepulivumamikigapiniw.pdfIn PDF document text
    • http://recrute.fr/files/files/96041119106.pdfIn PDF document text
    • http://selidbe-beograd.info/files/liradojokagos.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/powipuxarudexozoluxakekum.pdfIn PDF document text
    • http://kidsjeodo.com/images/files/naperuvi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=white+ball+in+bocce+ballPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB3 18824 bytes
SHA-256: 505766a7aa1a09360a0d397530995b081f9e7827a088803bdcc225f6ee1cf958
font_01_sfnt_off00010e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12685 10192 bytes
SHA-256: deb4ff585499f859dae2893bce055ab42b3311e350969db2348fc5582db0cfb2

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