Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d852c4696c58b1…

MALICIOUS

PDF

85.0 KB Created: 2021-03-31 03:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6d30d4be6e03a7d65623f29d309a7a6d SHA-1: 0236cdd89c2f667008247d9af0af89b5e1c802e8 SHA-256: 80d852c4696c58b15538a07eb83741ce1afcf047c0d240fdd692e8ac5731ec58
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://botokaw.ru/wix?keyword=jvc+kd-avx77+replacement PDF link annotation
    • http://goldenframecollision.com/xezevirajoboxokbeze8.pdfIn PDF document text
    • http://natur-bio.space/best_book_to_learn_python_for_data_science69gl1.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/robemoxogovakuzak.pdfIn PDF document text
    • http://vitetiw.getenjoyment.net/uttarakhand_gk_book.pdfIn PDF document text
    • http://gavediteriremuv.medianewsonline.com/cactus_and_succulents_identification.pdfIn PDF document text
    • http://smeh-mif.space/p938_vs_p238_sizeg6s6g.pdfIn PDF document text
    • http://lighterusb24.site/esv_bible_downloadoa9k1.pdfIn PDF document text
    • http://bitjoms.xyz/5176942226686cag.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/abu_garcia_black_max_5_parts.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/church_bylaws_template.pdfIn PDF document text
    • http://mydenverneighborhoods.com/54241124971qd7c7.pdfIn PDF document text
    • http://circus.market/9061984039371g7n.pdfIn PDF document text
    • http://freds.space/types_of_hemoglobinopathiestjz8u.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/5769818.pdfIn PDF document text
    • https://gileledera.weebly.com/uploads/1/3/0/8/130874536/b95421321.pdfIn PDF document text
    • http://heleogose.online/jolatexakepota2avj2.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/85215334541.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/44992053390.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_a59d6a1f19a94e8ca103cb2072d83f4c.pdf?index=trueIn PDF document text
    • http://sojusenetuki.onlinewebshop.net/fivuvejajalo.pdfIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_f312fdb8ceb041658be8e41ece14dd29.pdf?index=trueIn PDF document text
    • http://kavezusi.onlinewebshop.net/nivawilifim.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_off00010faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAA 5336 bytes
SHA-256: c509e449f0ac7b2b815394bfbea672190f1985e6bdd50ecfe92282a4e0960106
font_01_sfnt_off000121d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D9 10804 bytes
SHA-256: 6df8c1fcf22e64cc2522e8e63a7276f3ce89c6011f346c6331b9c20a2c255a73

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