Malicious PDF — malware analysis report

Static analysis result for SHA-256 68278060bc843ce6…

MALICIOUS

PDF

76.8 KB Created: 2020-12-11 09:09:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7563f3931f129a9a3dcd7e959ed2d9c2 SHA-1: 49ade6edd0478bff4978b3a79e430c2b183e1a00 SHA-256: 68278060bc843ce6af45dfe8cdf99037300456d05d1f30f12ba5778ea1da8ce5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. It contains numerous external links, with one prominent URL pointing to a suspicious domain, likely part of a link farm designed to distribute further malicious content. The document body, though heavily obfuscated, suggests a lure related to business communication essentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/123?utm_term=business+communication+essentials+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5f9145a4e7817.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/lojum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446270/normal_5fa020c4c8ce1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd15dd5dd8cf232ed1559f/1606227422382/the_fractal_continuum_hard_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/80192268312.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded95801-6174-4c46-a550-2ca15bf52e18/dovum.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/dubanuzed.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/gibobemiro.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2fb8aff13940aa24d3646/t/5fce8688634df57973765bb9/1607370385210/schoeller_allibert_boxer_packaging.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/software_quality_assurance_management.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/folage.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/dragnet_theme_sheet_music.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
    • 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_off0000d63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 5256 bytes
SHA-256: dede75dd0f558441a20f25dda7ec2aff79353157aa251c49b3232f109e2e318a
font_01_sfnt_off0000e813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE813 9976 bytes
SHA-256: 726258c630767ae54279774134d481863f38d1820feaf0a6360554881c623460
font_02_sfnt_off000109e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E6 18044 bytes
SHA-256: 3dc912528ef5f045e2d132860fe2592a860a0d75d12c506b4cefc719562cc377

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