Malicious PDF — malware analysis report

Static analysis result for SHA-256 89017125b5b7517b…

MALICIOUS

PDF

76.2 KB Created: 2021-02-19 22:13:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 3379b3c4216f8d59ef59169bed51c1bd SHA-1: 8b2e8232b60e2e4911c49c9d6d8aab7669c8a9ee SHA-256: 89017125b5b7517b73b959511db9347d696d975a94b8bd1daee3cfabcb8d59ac
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external links to other PDF files hosted on various domains, many of which appear to be disposable. The presence of a URL with 'utm_term=garmin+vivofit+3+battery+charge' suggests a potential lure for users searching for product information, which is then redirected to a malicious link farm. The overall structure points towards SEO manipulation or a distribution mechanism for further malicious content.

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://jottigo.ru/strik?utm_term=garmin+vivofit+3+battery+charge PDF link annotation
    • https://dotofinadi.weebly.com/uploads/1/3/0/7/130740455/d32f4f53c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417122/normal_6024b914702da.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/JTRiagf/waxafotonusin.pdfIn PDF document text
    • https://denuxikunoleluj.weebly.com/uploads/1/3/4/0/134018299/loxobob.pdfIn PDF document text
    • http://jnatural.space/plt_scatter_size_of_dotsvwfrt.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/LXkdiaS/transmission_repair_cost.pdfIn PDF document text
    • https://rivoliga.weebly.com/uploads/1/3/5/3/135311175/a4f63dca.pdfIn PDF document text
    • https://bifixebuwo.weebly.com/uploads/1/3/0/7/130776276/tuwokimuva.pdfIn PDF document text
    • http://exampl1214.com/scope_of_work_sample_templateja5t0.pdfIn PDF document text
    • https://zobupasig.weebly.com/uploads/1/3/1/4/131438120/wezosu.pdfIn PDF document text
    • http://lnstagram-office.com/5380810621520b72.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/hjjfIVY/crack_shooter_mod_apk.pdfIn PDF document text
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/diteb.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/ihfheGF/tupulevuzolatilekesuxuku.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/hyxXhdN/31225011642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456685/normal_601d6a3c3a2d0.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
    • http://mapojadesagez.epizy.com/best_free_ebook_templates.pdfIn PDF document text
    • http://xalelafo.rf.gd/buffer_solution_file.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF60 5368 bytes
SHA-256: fc20fbd62fec5cd705a9dfc4096c714b34e5ffd8bf38c288f1bf62bead78e8e0
font_01_sfnt_off0000f18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18B 10624 bytes
SHA-256: 350097a4c78e85cfa92a5cbe523030d624305b5959dd6a3b8e3ced53024b6f79
font_02_sfnt_off000115ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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