Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d90805117737b98…

MALICIOUS

PDF

77.1 KB Created: 2021-02-19 19:42:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3db8646667f7c6551893777e7b2b9dca SHA-1: bec04ee340aa6c1464c3999bc44ddcc9de6dd5a3 SHA-256: 6d90805117737b98617af816d6cafed4f847690ef1a5afd68b4f11e04b78e638
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm or phishing lure. The presence of embedded URLs and the ClamAV detection further support its classification as malicious, likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=alpha+epsilon+lambda+uf PDF link annotation
    • https://cdn.sqhk.co/pigexebobe/Qjcjage/63915896187.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxatotukaru/rbjaFjd/bein_sports_connect_canada_login.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450889/normal_6019524020a24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411252/normal_60015d97cf874.pdfIn PDF document text
    • https://vapasunodisina.weebly.com/uploads/1/3/0/8/130873802/wevopenenavupob_zokalot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366965/normal_5fcf28ae2b1b8.pdfIn PDF document text
    • https://livakazogoje.weebly.com/uploads/1/3/4/6/134622539/wujafamej.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/7c1e8394440029b.pdfIn PDF document text
    • https://ziwopigop.weebly.com/uploads/1/3/4/3/134380455/mojugak-vuludusagu-josarivupawaga.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460043/normal_5fe18d0e49f09.pdfIn PDF document text
    • https://nimifitirujaga.weebly.com/uploads/1/3/4/6/134693460/8984237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452169/normal_5fcbef65eec72.pdfIn PDF document text
    • https://rexawalifutox.weebly.com/uploads/1/3/4/4/134458468/3560788.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444623/normal_5fd7ec8349c8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xakusineba/vovop.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/ben_10_video_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/bsc_magazine_english.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/bakalasakatexitofibukonud.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE422 5116 bytes
SHA-256: 867f8bea018d12aa858bf102a81a7eaff38fb1e9a6896a6e9a4362322765d54f
font_01_sfnt_off0000f54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF54B 10492 bytes
SHA-256: 1f3ddac99edb4bf0482c47a0e716f179bccbd40112417b2e216b0145a0b195de
font_02_sfnt_off00011933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11933 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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