Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aad249777b82b94…

MALICIOUS

PDF

88.6 KB Created: 2021-03-07 06:36:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a7351265ce57ece68f8c2a6f54d6e726 SHA-1: 808394599e44cd4c6fedd59bd900101ba7907d9b SHA-256: 2aad249777b82b9486ea6216a8d789e327fc336c21328c8c28f8060be5fb6086
186 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 pointing to disposable domains, suggesting it's part of a link farm designed to redirect users to potentially harmful sites. The embedded URLs and the heuristic firings strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/wix?keyword=god+of+war+pdf+guide PDF link annotation
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/1710c244ae64.pdfIn PDF document text
    • http://goodik.fun/pulosolujesazgy92h.pdfIn PDF document text
    • http://pc-remont.website/how_many_calories_in_an_oat_milk_iced_coffeery7jp.pdfIn PDF document text
    • https://jabapimodixo.weebly.com/uploads/1/3/5/3/135314731/6f67317b6a40b0.pdfIn PDF document text
    • https://vidiguwases.weebly.com/uploads/1/3/4/3/134347373/nidobasuse.pdfIn PDF document text
    • http://216tilford.com/susidaosc9.pdfIn PDF document text
    • http://smartycredit.info/hp_ultraslim_docking_station_firmware_2018kcn4k.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/siluvurevej.pdfIn PDF document text
    • http://pitushok.fun/1051194117t6k8e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ddf4f8a-68ce-476b-b5f1-a03e332fbd0a/93169740201.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/discovering_french_nouveau_bleu_workbook_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61426ea-6c9c-412b-93bb-410f674b5454/tesarusukerofutur.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/6913776887.pdfIn PDF document text
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_60fb683a8c56417e8bbb4f80eb3fc2fb.pdf?index=trueIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_33ba038478cc4da4bb26f63b52bfd8c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vutame/best_books_for_9_year_olds_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/combining_like_terms_worksheet_algebra_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1441e3fa-7ce2-47c6-9d1c-adadef3fc371/39692419399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1cb13d1-30a8-4e7e-96d0-22286e0c0179/61376068006.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_06d46ce04a314322bcfe1819f77952b1.pdf?index=trueIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_0d261bd956554cb084b621b30d210f08.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d430daf-e54b-4b01-91d0-fea7e7759c68/kokapetenepakanipo.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/apunkagames_gta_4_android.pdfIn PDF document text
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_9061af31f18541e0b4a37c296e90cf68.pdf?index=trueIn 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_off00011fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD8 5120 bytes
SHA-256: 0bd8e767e27b2894727006b23e526c54437b15293646bd9c8f346cb397194d9d
font_01_sfnt_off0001316f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316F 10252 bytes
SHA-256: f1f2adbe08ddbdf4cdc7160fc98f913110bbc979b66d85d5188549ea9698be85