Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eefbe3de906ee69…

MALICIOUS

PDF

74.4 KB Created: 2021-03-15 00:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 964f4bdf3de3280a0fda645adc0f752b SHA-1: 10c4f503df806f83294917a80c10f3f53268f727 SHA-256: 8eefbe3de906ee693ee5ef98d1bb893cea0e9265b08e3d3f7de2b8e1efbfbf15
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many hosted on disposable domains, which is characteristic of a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate this malicious intent. The ClamAV detection and ML classifier further support the malicious nature of the file, likely serving as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/123?utm_term=apple+app+store+zip+file PDF link annotation
    • https://cdn.sqhk.co/riraxizilob/VDifwij/16442785999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486350/normal_601c71a129d09.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/dhj1hbu/jaterifulipudon.pdfIn PDF document text
    • https://cdn.sqhk.co/tirabipati/hiW5hhy/togon.pdfIn PDF document text
    • https://cdn.sqhk.co/nilimijano/ibbDTXd/japanese_name_generator_female_anime.pdfIn PDF document text
    • http://cashtanks.fun/18415967890lo421.pdfIn PDF document text
    • http://shopwithsale.website/poemas_de_jorge_luis_borges_cortos_de_amistad2l1of.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/igpeje6/cambridge_fce_listening.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372955/normal_5fd778f0a3534.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480884/normal_5fe1a2b18e22b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403415/normal_5fcbc4e68ec9f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_774d24bccba349078577915123fc075f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fodose/6101396030.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/offline_plagiarism_checker_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/is_eclipse_on_amazon_prime.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_6e472358de394b21abeaaecef2d86436.pdf?index=trueIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_3d737f055d764bab8921ff283be19e43.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/munomasagona.pdfIn PDF document text
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_9028434312d44c69b8c01704f3b307e6.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_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 4932 bytes
SHA-256: 89bd12ece4608746d104178d03414ac682cd90739642faccc9877790fb5cac16
font_01_sfnt_off0000f5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D2 11436 bytes
SHA-256: e192422f336618474b64ee4baff42ac19525dfc3c0bdb5cd6f96dd9991ce166f

Open this report in the interactive analyzer, or submit your own file for analysis.