Malicious PDF — malware analysis report

Static analysis result for SHA-256 7422b922273978c3…

MALICIOUS

PDF

78.7 KB Created: 2021-02-19 23:28:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0ef360923b0e5a34cf58c4e9b1985b55 SHA-1: 962f8e8ff68d32490186940551ae13e82e98f758 SHA-256: 7422b922273978c39108858f633ef638ea1ffaf016c84dac88d52ddd5593f749
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://crophysi.ru/wix?keyword=who+made+god+yahoo+answers PDF link annotation
    • https://cdn.sqhk.co/bufudoraxala/5D2jhIW/85324584791.pdfIn PDF document text
    • https://bamufikike.weebly.com/uploads/1/3/1/6/131606241/fipaxadat_kejulux_nokug_jasewodudiga.pdfIn PDF document text
    • https://zajilonuxiwez.weebly.com/uploads/1/3/4/8/134871265/1638716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476766/normal_60159f37ca369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407087/normal_60180f7d990b8.pdfIn PDF document text
    • https://pepesavujol.weebly.com/uploads/1/3/1/0/131071240/6774657.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/heOjjuA/pocket_tanks_online_free_no_download.pdfIn PDF document text
    • https://rejileju.weebly.com/uploads/1/3/4/3/134335231/tapuzi.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/jorotuxakasivug_fikimu_vagujiragidi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5ffd7c3edaf79.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/VGgc0gg/groupme_support_phone_number.pdfIn PDF document text
    • https://kezidixujaroko.weebly.com/uploads/1/3/4/0/134040737/2935799.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408875/normal_5fe2c09a9f12d.pdfIn PDF document text
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/dded64eb27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384817/normal_5ff4b2443cc05.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/wovigebi/cadera_anatomia.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/blood_of_elves_audiobook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/dadasawasikegavarifasif.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DC 5412 bytes
SHA-256: dfd686d437f50d415abaf6a277d38ec7c3d0f7e4d2801f10af9fa0ab93c42055
font_01_sfnt_off00010a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A38 10320 bytes
SHA-256: fad8cc9529f31567bf5a6a3f27c57f1287bc0d6c0b544f8cc40958b786d1b911

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