Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f401582ab1e536…

MALICIOUS

PDF

79.6 KB Created: 2021-04-01 00:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c19b9a36925c35d69e81154d9dccba1e SHA-1: 0949f387172a2ae576f9a6ffb48defcb4ccd46bf SHA-256: 44f401582ab1e5369bc54fccdae94261188020c86c43cd0e910eec99e4659596
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/123?utm_term=calibration+of+burette+and+pipette+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409818/normal_60289ea00948d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_60246e8e0f659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5fd659f2b0216.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371025/normal_6006f300bbcb7.pdfIn PDF document text
    • http://sebekeruxa.iblogger.org/autocad_2007_crack_only_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_6058b85438799.pdfIn PDF document text
    • https://jumaxejew.weebly.com/uploads/1/3/1/6/131606465/napiwijijewuno.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_602fea6ea213c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465537/normal_6017d06d0c2fc.pdfIn PDF document text
    • http://perfectiona.online/cdigo_penal_de_puerto_ricorab3v.pdfIn PDF document text
    • https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/kaziri-lapijexos.pdfIn PDF document text
    • http://chambre.xyz/commercial_vehicle_accident_report_form_ukcurpi.pdfIn PDF document text
    • https://wakukaxowemaba.weebly.com/uploads/1/3/5/3/135303752/b2ec79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_6064e6b111b12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484993/normal_5ff2736f92428.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wazizofukukifog.epizy.com/exponents_color_by_number.pdfIn PDF document text
    • http://vejimugar.epizy.com/68645396460.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/death_note_characters_zodiac_signs.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/tepiribepipizizuxuniset.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/97212608838.pdfIn PDF document text
    • http://vojapexa.rf.gd/administrator_definition.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_off0000fa8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8F 4904 bytes
SHA-256: 918863fef37e0d348cbba38e94a14f7f3c729d24b29c585945dda74f19336929
font_01_sfnt_off00010b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3F 11128 bytes
SHA-256: e4be578fa0ab0b1d188c2e4ff260cf304c88c6a0be79e5bf9b7abf13a0298e70

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