Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5cbc972a923c28f…

MALICIOUS

PDF

80.1 KB Created: 2021-03-04 18:24:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e8e6bb35502a2ddd6ed5637cd1d29cf1 SHA-1: b24905c66cc5b6b61235bd303819555480f240c5 SHA-256: b5cbc972a923c28f265fa8bff04e23497cba663af9f001779fd8d40a0c434c5a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 hosting, suggesting it functions as a link farm designed to redirect users to potentially harmful sites. The document body content, though garbled, includes a search query related to 'Scag mower repair near me', which is likely a lure to disguise the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/123?utm_term=scag+mower+repair+near+me PDF link annotation
    • https://cdn.sqhk.co/tiwefuxab/Phjjchd/nenazovulur.pdfIn PDF document text
    • https://cdn.sqhk.co/dirujigowag/gP7jege/53435419444.pdfIn PDF document text
    • https://cdn.sqhk.co/mopijiluxu/hhiblih/mortal_kombat_11_best_characters_list.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/qK1Othg/learn_spanish_language_listen_speak_reader.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/ha2gehj/fugikujotunim.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/h3PSDif/97694542457.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/7hg4b38/beragiwenakixadep.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://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_d86ff7b2b6cf4a6a94f892170329bf68.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/gomutagogijux.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/97686493371.pdfIn PDF document text
    • https://95e354e6-8561-4e52-807b-deb85f3b5fdd.filesusr.com/ugd/ca9b0a_a903f33c12c842eab3ca36681b6fe62c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/085a790b-b453-43b3-b9df-a3e9aa5c7793/trig_integral_identities.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_3484c75d0f9b43d4adc55f86de4228e5.pdf?index=trueIn PDF document text
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_565d4651f15d4be984469f571a1339ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/xejulizagukikavoxo.pdfIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_767eb2a06dab4ed7a1d94f70d66488ca.pdf?index=trueIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_c3b3986d75bc428f85ef635c4ba66d65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a284da8-b529-411d-b4b5-71120baca84b/how_to_turn_off_demo_mode_pioneer_deh-6400bt.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/95264799488.pdfIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_cbaa6791201b48e5a70d03a506891154.pdf?index=trueIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_ce6ac9c549954777aac62406e1fd0bb2.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

Related samples 5

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_off0000eeef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEF 4948 bytes
SHA-256: f05947c871f7dc6f16648fa4a71dd16e965307e640517de07763c9b3d44ed469
font_01_sfnt_off0000ffa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA3 10840 bytes
SHA-256: 880523391c46c67f0264b5e2acda7913c752fbd71d26ee74cc6310b2b833ef44
font_02_sfnt_off0001248c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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