Malicious PDF — malware analysis report

Static analysis result for SHA-256 82fb77617071ecef…

MALICIOUS

PDF

75.8 KB Created: 2021-04-23 03:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9c64fe669df407a49d596ddd9c48acba SHA-1: 269bc9190b7369f4f0fedd30eec262041e141cfb SHA-256: 82fb77617071ecef12605b6b2359b3417de2188a43030731d21f1ddbdc36a698
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or malware delivery attempt. The document contains numerous embedded URLs, including one pointing to 'zajinet.ru', which likely serves as a lure to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests the document's purpose is to host a large number of links on disposable domains, characteristic of phishing campaigns.

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://zajinet.ru/strik?utm_term=how+to+clean+husqvarna+lawn+mower+carburetor PDF link annotation
    • https://jipoditilab.weebly.com/uploads/1/3/1/4/131407274/nefodesaloz.pdfIn PDF document text
    • https://cdn.sqhk.co/pugijuzo/dHM9cJK/dominos_delivery_times_australia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_604b679f18ad5.pdfIn PDF document text
    • https://cdn.sqhk.co/bobimugura/ciifqjc/43469518595.pdfIn PDF document text
    • https://rexekimat.weebly.com/uploads/1/3/4/0/134017736/6236526.pdfIn PDF document text
    • https://tedozumezefa.weebly.com/uploads/1/3/2/7/132740670/fumimilijufikegedisi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403817/normal_5ff3b6b946c75.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416919/normal_5ffbbf4cbb31e.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/wordly_wise_3000_book_8_answer_key_free.pdfIn PDF document text
    • https://ligunoko.weebly.com/uploads/1/3/4/3/134308404/244883.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/g4hejbf/65796919331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371543/normal_5fee067dc46ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xenemusexo.epizy.com/16890574791.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/odyssey_robert_fitzgerald_summary.pdfIn PDF document text
    • http://dapekafuxururo.myartsonline.com/aritmatika_komputer.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/kingdom_hearts_2_walkthrough_guide.pdfIn PDF document text
    • http://fizanotafogibag.rf.gd/novered.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/66922860969.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_off0000eaa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA5 5416 bytes
SHA-256: 1e0ffa0e1f2c1619b8327526bd7b107e94711809cedb91d729a53355d71c7c74
font_01_sfnt_off0000fcff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFF 10796 bytes
SHA-256: e2dce35fcd2075b02bf6ae168dc0a75a77c65e5c863bf4e76f463caafc3185c4

Open this report in the interactive analyzer, or submit your own file for analysis.