Malicious PDF — malware analysis report

Static analysis result for SHA-256 486dfed0d952a432…

MALICIOUS

PDF

68.1 KB Created: 2020-12-10 03:59:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: da106c848c1b21f2fc99979e45388f8d SHA-1: 6a06f0e7b28e2fee81602c5ab500d62e95c4d29a SHA-256: 486dfed0d952a4328b2bb2893309c74b74689b901c5e3869843784d921a8035e
186 Risk Score

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-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://traffnew.ru/strik?utm_term=aquapure+error+code+125+194 PDF link annotation
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/tapexirek.pdfIn PDF document text
    • https://sixonawujow.weebly.com/uploads/1/3/4/3/134369174/5477803.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/naduge-xunigeloravufif-raguteba-xorobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411483/normal_5fb98ae402dbc.pdfIn PDF document text
    • https://faworufobideped.weebly.com/uploads/1/3/2/6/132682851/143a4.pdfIn PDF document text
    • https://paxobafu.weebly.com/uploads/1/3/4/6/134697986/8624498.pdfIn PDF document text
    • https://beginuvemosuso.weebly.com/uploads/1/3/4/6/134699988/9117191.pdfIn PDF document text
    • https://suxomosiwe.weebly.com/uploads/1/3/4/3/134350922/nejaratakes_lijimera.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc3a89988c99b6d37b8817f/t/5fc4ceae9ee0f32b87eb071f/1606733489361/la_iglesia_catolica_la_verdadera.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdefca2dd96f5918b32729/1606283214383/atomic_structure_chemistry_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/famsa_furniture_houston.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_off0000cb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7F 5524 bytes
SHA-256: 1ffb698086c87d1c65a1cf765f67e869d541b18457fd66afe9abfdb89612bb43
font_01_sfnt_off0000de5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5F 11076 bytes
SHA-256: c8883d96e9d3f60913dac184beb808e2d4918f9dd394a7bd8301df2bc61efc92