Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2aa2b05d47ed4d…

MALICIOUS

PDF

68.4 KB Created: 2021-03-20 16:38:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7440d551d8cfa104ab23769541e27d00 SHA-1: 604eb729941f5a99e565b5d40ba13663ce5d4826 SHA-256: 1f2aa2b05d47ed4d02b106d6a084073702c87b23da738c682908eb5417b1a39a
186 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The document body, though heavily corrupted, contains text related to a 'Huskee tiller manual', which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=huskee+tiller+26750tsc+manual PDF link annotation
    • http://fesabip.iblogger.org/definition_of_safe_haven.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/fungal_colony_morphology.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/new_english_file_beginner_teacher_book_chomikuj.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/buprenorfina_transdermica.pdfIn PDF document text
    • http://memexeti.66ghz.com/xezitogenitifatagoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b998fa74-583e-446a-a2a7-67f41460fdb2.filesusr.com/ugd/e081f8_bd205dc7e9774672a9ed9c7a2a733849.pdf?index=trueIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_cc7605555c5c4944b67f0d73b95484be.pdf?index=trueIn PDF document text
    • http://fojodopid.rf.gd/christ_the_king_college_uniform.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_fc949417d423449ba10bb651f68e9172.pdf?index=trueIn PDF document text
    • https://7f1158f2-e44e-4cac-991a-806210d1dc3e.filesusr.com/ugd/e4a8e1_bacf505db42f4b03aa4106fb354baab8.pdf?index=trueIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_9aacea3ab26646ec8ee4c264c69f90b4.pdf?index=trueIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_77bf980c192f4fb5b841f5ad094f9d16.pdf?index=trueIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_b3267aaafbd145f498e6350b2d215b53.pdf?index=trueIn PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_2a7ad75511954574978f264021fba5d3.pdf?index=trueIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_b655b5686c024110a8c5b6429ac27bb4.pdf?index=trueIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_d1fd257e801645e1acbafd84561b1b4f.pdf?index=trueIn PDF document text
    • http://lopejad.epizy.com/68969192508.pdfIn PDF document text
    • http://godemesefiw.epizy.com/jutuvajokanuvudep.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_off0000ccc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC1 5604 bytes
SHA-256: 67de5ae0cb41da9388fd36c2a2a9bfa18aa01f14a5c5bf6277b65a8b6f846dd7
font_01_sfnt_off0000dfbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBF 10304 bytes
SHA-256: 2688f407e5770aff589f62d75b83909da146a28d5fb4235ea91e031250c58a32

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