Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e871d454af38690…

MALICIOUS

PDF

64.7 KB Created: 2021-02-20 10:48:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1afbb95fdba7400bcec521c01a3d7f66 SHA-1: 8cacc8c3cd4989bc18ab7d55ec2c17dcb3741437 SHA-256: 0e871d454af38690737abb7465ac261313b09659376944bbf578006210e61059
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links pointing to various domains, many of which appear to be disposable hosting services. This behavior is characteristic of SEO link farms or distribution points for malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external URIs supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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://bologen.ru/strik?utm_term=craftsman+front+tine+tiller+6.0+hp+26+price PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453551/normal_5fcabc0aaf7b9.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/odRjhGW/49350071139.pdfIn PDF document text
    • https://denimuka.weebly.com/uploads/1/3/4/5/134582609/3728653.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/dgcjchl/99483924889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_6022ba99af379.pdfIn PDF document text
    • http://fishland.store/989991056786rjha.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/yhajfhi/57848451833.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/0vm0jd7/denufuzewomotum.pdfIn PDF document text
    • http://jilet2.club/heart_problems_symptoms_teenagerox9wk.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/hijjaha/10516363571.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/hfjV8ib/world_war_2_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/mhhhj47/71674438665.pdfIn PDF document text
    • https://nalovitifa.weebly.com/uploads/1/3/4/6/134600698/didiwakisivex-vanul-xesuxakumatirez-gowabofen.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/jhJgjgj/60235313031.pdfIn PDF document text
    • https://bivedaniliged.weebly.com/uploads/1/3/4/7/134732971/9fcae9d17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388183/normal_5fcc7d3d491ef.pdfIn PDF document text
    • https://pesulomerusetus.weebly.com/uploads/1/3/4/1/134109359/3281937.pdfIn PDF document text
    • http://hh666o.site/fibilexikamemunkwz6g.pdfIn PDF document text
    • https://jizenovu.weebly.com/uploads/1/3/4/6/134682428/bobise.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/12311137228.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/pakistan_embassy_form_b.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/wu_tang_documentary_showtime.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_off0000bfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD2 5620 bytes
SHA-256: ce163e9c6c4ee75b3974ce2b038521c150b88276b8a5d730f7fa9ec2b22af28d
font_01_sfnt_off0000d2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C2 10148 bytes
SHA-256: 201dbae94a076ef067964d8122eafa97b0602450888806f5cf55aa797943b694

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