Malicious PDF — malware analysis report

Static analysis result for SHA-256 14157db29dd89b5a…

MALICIOUS

PDF

110.5 KB Created: 2021-06-10 03:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c48093fd07b09331c1c9dce2b4beb693 SHA-1: a82e4e6e62be7a37baf2ddb3ea08ee21e5ad618c SHA-256: 14157db29dd89b5a34252df5bc5ede69df438ef09ee2acccd2e609357a0575b5
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. The embedded URLs suggest the document's purpose is to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cructi.ru/pbw?utm_term=naruto+volume+2+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418180/normal_5fc6c95948bc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_600de45c0a811.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4450747/normal_60b769ed2ea0a.pdfIn PDF document text
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/jexovubupikowojojof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413456/normal_6030f9fcd03d1.pdfIn PDF document text
    • https://ximixejolulozo.weebly.com/uploads/1/3/4/3/134351986/d6eb57f57b2f2.pdfIn PDF document text
    • https://gujavaluzosozu.weebly.com/uploads/1/3/4/0/134013303/gorisamage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_606d4223344e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_6016f2bd21c01.pdfIn PDF document text
    • https://mikazeral.weebly.com/uploads/1/3/2/3/132303371/2312190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460694/normal_5fd30cd27f1e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408991/normal_60651056daf6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_600a4c4211d0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479916/normal_601c6ff01827a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445570/normal_6063e43f24add.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_602bec30d530c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459470/normal_606a1516e9549.pdfIn PDF document text
    • https://vulewerogoxo.weebly.com/uploads/1/3/4/5/134507491/giteguxikusunow_zobaxiv_nafog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joxakuruvi.pbworks.com/w/file/fetch/144625920/why_is_my_alienware_not_turning_on.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144415032/81714668583.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F8 37656 bytes
SHA-256: 7273e382628c18cbfafd14545d50bdcead8b22b8e3c276b28192ad34a986d325
font_01_sfnt_off00015f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F2F 5264 bytes
SHA-256: faf710c82394e14be8a54e26930b559a3ab45c6be41a5908da7657893e3d48ba
font_02_sfnt_off00017124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17124 11128 bytes
SHA-256: 5711784d563a252b9221646d18840a18cbe7a97593ba7a2952d75e94c17876a2
font_03_sfnt_off00019746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19746 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330