Malicious PDF — malware analysis report

Static analysis result for SHA-256 632954e45fa44c5e…

MALICIOUS

PDF

70.1 KB Created: 2020-11-16 23:08:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 46416180c4834132c2dbbbced4efdada SHA-1: 1a704cdda3dd6014818ff69a21112a64c3c44f26 SHA-256: 632954e45fa44c5e14bd27e2578deec666b9eb1ff74c60b1428354eeb59c9993
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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 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://trafficel.ru/strik?utm_term=determinante+de+matriz+4x4 PDF link annotation
    • https://vimasavugaf.weebly.com/uploads/1/3/4/5/134587410/pamagewalexini-tufafokibita-sikixus-fupufeg.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/4b26c3b70bbd7a.pdfIn PDF document text
    • https://linoratu.weebly.com/uploads/1/3/4/4/134403550/duseduk.pdfIn PDF document text
    • https://nirumoxizexajiv.weebly.com/uploads/1/3/4/5/134524745/jafujarafeguzijonone.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/942126.pdfIn PDF document text
    • https://sowameneritela.weebly.com/uploads/1/3/0/7/130775755/gipeteva.pdfIn PDF document text
    • https://raminatu.weebly.com/uploads/1/3/4/5/134579417/8ba63.pdfIn PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/d9432a51c7311a1.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/vaxebisapesi/lezamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b63476dc-a11a-4822-8e60-2c07cd2a5ff4/32940854986.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/nujune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b94a32e2-212a-45ba-b448-0b4991dfe3e8/wolf_life_cycle_photo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d0a0ffd-4ff9-4558-aa36-fec2dbf86f1a/99823581593.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/gobuxujivuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3335886-b541-4561-a977-adc0390c53c1/dazeparawomuv.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC760 4644 bytes
SHA-256: 53f0cad8ba0dcf51f57caa5cd0e98e34c07934ed5ab1e0ce3cf5d1a49a6dcbea
font_01_sfnt_off0000d70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70D 11748 bytes
SHA-256: cbd92e261d3719b3e3f48c65724d09b1a6f6f1e5428899ca12a727ec6799e569
font_02_sfnt_off0000fdb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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