Malicious PDF — malware analysis report

Static analysis result for SHA-256 e774a07ba5bba15a…

MALICIOUS

PDF

69.2 KB Created: 2021-01-12 15:47:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 25b10ce84d955f194ac0b94b6c617991 SHA-1: 81f0048392b53dbd432594c00295d772c50fee78 SHA-256: e774a07ba5bba15af164de7bdc09ccf6901be8edafad8f8204ee24e80a5dbf2f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document is part of a campaign to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/aws?utm_term=athabasca+weather+report PDF link annotation
    • https://wapojopaboxijok.weebly.com/uploads/1/3/4/7/134747084/1181517.pdfIn PDF document text
    • https://nuwukovodikala.weebly.com/uploads/1/3/4/6/134666266/5787928.pdfIn PDF document text
    • https://site-1173349.mozfiles.com/files/1173349/zosifuxer.pdfIn PDF document text
    • https://rukagevilatixa.weebly.com/uploads/1/3/1/6/131608017/vusawatewobutifu.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/90b66.pdfIn PDF document text
    • https://site-1168379.mozfiles.com/files/1168379/mini_bundt_cake_recipes_using_cake_mix.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/solobiveki.pdfIn PDF document text
    • https://site-1172169.mozfiles.com/files/1172169/61980816348.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/media_ecology_marshall_mcluhan.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/65507190358.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/animal_jam_play_wild_hack_accounts.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/vujudozimebojawop.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/bikemalagejubagemegedojaz.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/70684809917.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/pawoxuwomowejubili.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFC 5212 bytes
SHA-256: dd07f3f8fbb499647e89d533b5b069b05698bb93bd573b0d5ef43eaa3f542529
font_01_sfnt_off0000e1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BE 11324 bytes
SHA-256: 909ca3074f5693c8f87d772a04dc2a37970f9c51c2bd4b2ef4e4580817b7c8a1

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