Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0cdc3dabbc6a8b…

MALICIOUS

PDF

76.1 KB Created: 2021-02-26 01:57:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: aec41570727d2f55dacd905bde0578ec SHA-1: d9001b543f5be10f45c8edc7e679770a15ed039b SHA-256: 5c0cdc3dabbc6a8be9d3157a187b1e154983399980ad0765ade6b41945932a36
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be related to search terms, further supporting the phishing lure hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/award?keyword=kerosene+heater+parts+near+me PDF link annotation
    • http://parkji5x.xyz/zopatikuwanojipevusunvqm77.pdfIn PDF document text
    • http://omynutural.space/inside_out_theme_song_piano_sheet_music62rxl.pdfIn PDF document text
    • https://nusuwexob.weebly.com/uploads/1/3/4/3/134352417/duzef.pdfIn PDF document text
    • https://zafewogi.weebly.com/uploads/1/3/1/4/131407253/3475701.pdfIn PDF document text
    • https://xavodumofas.weebly.com/uploads/1/3/4/9/134901052/63baf111a8.pdfIn PDF document text
    • https://cdn.sqhk.co/kikutajaz/ghi0khi/clouds_song_lyrics.pdfIn PDF document text
    • https://mebedepubini.weebly.com/uploads/1/3/0/8/130813558/b2d06.pdfIn PDF document text
    • https://wumifidadorubip.weebly.com/uploads/1/3/5/2/135298964/9429ea7523.pdfIn PDF document text
    • http://yourbigdick.space/63170112002blw91.pdfIn PDF document text
    • https://jososipiwudamuw.weebly.com/uploads/1/3/2/7/132740918/997abac9f672.pdfIn PDF document text
    • https://zudiwimuda.weebly.com/uploads/1/3/1/4/131438079/a0b73303c7b.pdfIn PDF document text
    • https://xafozidej.weebly.com/uploads/1/3/4/6/134643925/b46e3.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/jaBhLhe/shoujo_city_3d.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/gofiguj/air_force_safety_investigation_board_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/gupijixaw.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/major_landforms_in_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/sexomozu.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/71664287751.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_off0000e19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19D 4736 bytes
SHA-256: b057c1d1f202aa25dc896bf263afc2993ef6232a83131d428de9ff694a667920
font_01_sfnt_off0000f17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17A 10368 bytes
SHA-256: d7cb82c2378ed86a9522a1ee2b3c5ddd7715a71d5b3dc3be38c3fccb605dc70c
font_02_sfnt_off00011500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11500 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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