Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd1efa0d274c2a7…

MALICIOUS

PDF

78.1 KB Created: 2020-12-09 09:10:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 07cacc4991af2618fe2b2a8f77eaffed SHA-1: 24d6566a382ae04e0a87bcb8f04c74e708a35e87 SHA-256: bdd1efa0d274c2a7fb3ad25f05f289481daa76c74a0dc2b0538ea90f5fc19919
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to disposable hosting services, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The presence of external URIs and the overall structure strongly indicate a phishing or SEO spam attack pattern.

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://trafficel.ru/strik?utm_term=ballad+of+gay+tony PDF link annotation
    • https://fibuwuvonej.weebly.com/uploads/1/3/4/2/134265895/4290351.pdfIn PDF document text
    • https://wedezetepeb.weebly.com/uploads/1/3/4/5/134528952/sosisitu-nuwubuxiz-falosevotopino-vedad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5faeb4d9249fc.pdfIn PDF document text
    • https://mosodujisar.weebly.com/uploads/1/3/0/7/130739504/dcb351aa2b42fe5.pdfIn PDF document text
    • https://pasezarovatif.weebly.com/uploads/1/3/4/8/134858127/liveteberejuzim.pdfIn PDF document text
    • https://sobanuwutotamiw.weebly.com/uploads/1/3/4/1/134131644/vorujubopegowobu.pdfIn PDF document text
    • https://fenawivo.weebly.com/uploads/1/3/4/0/134000055/8974c3586f8.pdfIn PDF document text
    • https://degepuwenezeg.weebly.com/uploads/1/3/1/6/131607310/6278009.pdfIn PDF document text
    • https://pafofenolaf.weebly.com/uploads/1/3/4/6/134668810/jumobit.pdfIn PDF document text
    • https://mojenosude.weebly.com/uploads/1/3/1/3/131382274/e77048f31d9a457.pdfIn PDF document text
    • https://puxezemugip.weebly.com/uploads/1/3/4/3/134311794/2a3a78.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/5fc6eda9a4d75e5252f1a6be/t/5fcf214d05f6f27807536c37/1607409999286/tiripetosaruwe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc111b5ff13940aa240a14e/t/5fc4eb903570fb44d19d353c/1606740881180/breath_of_bwonsamdi_to_sanguicell.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/transformer_manufacturing_companies_in_saudi_arabia.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/accident_report_trenton_nj.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_off0000f3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CD 4952 bytes
SHA-256: 5611c660e650d3912c4d58f88c71041b789beccecbb2db6ae64cfcadfa743ec6
font_01_sfnt_off000104cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CC 11764 bytes
SHA-256: a3278ff0a3c2a740f578aaf4dd158c5cfdfe2cba0e6dab871183d72c8d1a874f

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