Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a96479c509e9f5…

MALICIOUS

PDF

87.7 KB Created: 2021-08-03 08:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 015473af21d2214ff171c2eefc4df0c8 SHA-1: 67dca41cbe2a3fd3d93ceb28c4bffbb59d813129 SHA-256: 76a96479c509e9f50cfaf779b83c71a54996a609192b8f3ae69b07fef191fcb3
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pixomot.ru/uplcv?utm_term=sims+freeplay+hack+ios+download PDF link annotation
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/cacdba4a73c3a4e1ae12df3adc9b1207/pijivitexavigire.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/83266651060.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/re257out4vllnodl1ud78002l1/verosinekix.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/tojopopimuruvosevoloxiz.pdfIn PDF document text
    • http://mylodge-naoshima.com/59295699579.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/f77d5d58e23e038cfbfdc5bbfe16b45d/jazilirigumuzemavojuk.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/616191ffddd6d3c78a2e2b54660d03eb/50782365256.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/pitobasege.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/dajimifu.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609efa394e17b---zimejakatixatuk.pdfIn PDF document text
    • https://angkagenap.com/contents//files/45269803843.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/35207595767.pdfIn PDF document text
    • http://aapltd.net/userfiles/file/36981430282.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/17520938276.pdfIn PDF document text
    • http://jsdarvin.com/files/64072327444.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a404a52d09c---xajora.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/kopodev.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/mexesevixepaxofosifijax.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b56edb597c---30815427136.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ddf1394e08d---79301117131.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/xikadeleral.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/kevitopizusababatuvow.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD5 11156 bytes
SHA-256: 00d8f1d46908130f03bafebcd69b7e330a315ff1b405642e5c57381057ab8e47
font_02_sfnt_off000124b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B1 16852 bytes
SHA-256: bd5341adc0cb33aad77a6d4821d59f99052951c147460a70ec6324bfda974fad

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