Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe76ccd86190816e…

MALICIOUS

PDF

77.2 KB Created: 2021-03-04 20:18:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2cb51ebf3c4b5c645e154ab4474099ba SHA-1: c43bf670441c8e826c45012b08fd9d5d4dc68f0d SHA-256: fe76ccd86190816e1c79f5299c04c88e576ae9a01b34b854cfcae520a425b4fc
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains or link farms, suggesting a phishing or malware distribution scheme. The presence of a URL with a 'utm_term' parameter further supports the idea of a targeted lure, likely intended to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://nipisod.ru/strik?utm_term=shortcut+key+for+taking+screenshot+in+windows+7 PDF link annotation
    • https://cdn.sqhk.co/tumitibira/eNjhchc/download_racing_fever_mod_apk_android_1.pdfIn PDF document text
    • http://vevolim.iblogger.org/9075449946.pdfIn PDF document text
    • https://tinubuwetoka.weebly.com/uploads/1/3/5/3/135325034/fumuloxalasevixazima.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/haggtru/bipajokini.pdfIn PDF document text
    • https://cdn.sqhk.co/jojipimuve/gf4giEE/11219769397.pdfIn PDF document text
    • https://cdn.sqhk.co/jasorevujoxu/Bfje2if/58509536993.pdfIn PDF document text
    • https://xavimunemu.weebly.com/uploads/1/3/2/8/132815343/2398322.pdfIn PDF document text
    • https://cdn.sqhk.co/guwewaxa/1jhRJgi/jolejemosaneveleluvakibe.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/KghjDD7/land_rover_freelander_off_road_parts.pdfIn PDF document text
    • https://gelowabizum.weebly.com/uploads/1/3/1/3/131398428/masiwisu.pdfIn PDF document text
    • https://nigenodesi.weebly.com/uploads/1/3/4/4/134480521/7ac1cc1a3.pdfIn PDF document text
    • https://wawenefawopi.weebly.com/uploads/1/3/4/4/134494228/9977082.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/cxjhcja/84221243864.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/ixifgeI/kiwakopomune.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/gjeW12B/2922844520.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/finekadefefigobuxuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najepesirezamuz.rf.gd/achyutam_keshavam_bhajan_song.pdfIn PDF document text
    • http://zajegugolex.epizy.com/65467123353.pdfIn PDF document text
    • http://mobutomamalu.rf.gd/97507137928.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/safativemi.pdfIn PDF document text
    • http://pewidaxadumo.rf.gd/why_does_my_heating_not_turn_off.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/animal_cell_coloring_sheet_labeled.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_off0000ed64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED64 5692 bytes
SHA-256: 20b0d20c9aefdc3880b8c5c2e55a7e77cf58820af8610aeb877f6a0a5f5706c0
font_01_sfnt_off000100e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E6 11176 bytes
SHA-256: 3ed0e0e26b1657bf245caac882381b52d39b6686a6503eafbdd1cbb4bca7b0e1

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