Malicious PDF — malware analysis report

Static analysis result for SHA-256 60412405cf486156…

MALICIOUS

PDF

75.4 KB Created: 2021-04-04 15:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 806bc2dd2de86f22ae295af7b504adf7 SHA-1: 58987bcdeabf1f1ae5c3f2710227d23f9e5509ec SHA-256: 60412405cf486156509a8677062bc9fb0fcf858afa569efbda0677aed41565c4
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://jacksth.ru/award?keyword=acoustic+blues+guitar+tabs+pdf PDF link annotation
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/ruvesezobexegufure.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/kifagurelegex36ee.pdfIn PDF document text
    • http://salonvarna.com/90149309960z2xd4.pdfIn PDF document text
    • http://mignonette.space/jingle_bells_piano_tutorialur3h0.pdfIn PDF document text
    • http://draiwenstore.online/atoms_ions_and_molecules_worksheet_answersxb380.pdfIn PDF document text
    • https://bakozejujibabe.weebly.com/uploads/1/3/4/3/134373724/foxid.pdfIn PDF document text
    • https://paludiwebi.weebly.com/uploads/1/3/4/0/134012690/53492f3265aa85.pdfIn PDF document text
    • https://palobakuk.weebly.com/uploads/1/3/4/5/134523632/1fd48e0.pdfIn PDF document text
    • http://kmikaerfs.ru/gray_sheet_diet_overeaters_anonymous9wzwt.pdfIn PDF document text
    • https://vaxuziboz.weebly.com/uploads/1/3/4/6/134695811/fopazebepat.pdfIn PDF document text
    • https://botitanape.weebly.com/uploads/1/3/0/9/130969352/3462701.pdfIn PDF document text
    • https://kekufakaxuw.weebly.com/uploads/1/3/2/7/132740700/8e1890c.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/dazinibonofobi/manual_caja_registradora_casio_pcr-t280_en_espaol.pdfIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_9af53cd2159d484faec02894fdbca283.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nemafu/10433118757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1c00eec-0deb-41fd-ba4a-6f56551168b3/carl_rogers_therapy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd22e0d-34f2-4bb0-a6de-cf9313416b12/34549490282.pdfIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_63aac56a6f084560ba1c6385489b9404.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pomaxa/23669240844.pdfIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_572870930cf449529107f166576e7974.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/how_to_trade_like_a_stock_market_wizard_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4775209f-3fcf-4d13-9070-f6a0ccdae26a/wunoka.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_off0000e822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE822 5452 bytes
SHA-256: 9dfc38fcbd96b4e5e7516fe0f224a265aafddc306463c7c5eb9bb3dc208c3a9b
font_01_sfnt_off0000fab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB7 10676 bytes
SHA-256: 23718634c0d672cc3a33fdf6bedcaa214834565a74bba3c1a94411287c48d7ec