Malicious PDF — malware analysis report

Static analysis result for SHA-256 249eabbd7143d7e0…

MALICIOUS

PDF

79.5 KB Created: 2021-03-25 08:12:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8dfb743782ca1c6e6a1e86b3b2c6084e SHA-1: 2b03d038fb97cd648cc133d5b7aab01d4ea7a902 SHA-256: 249eabbd7143d7e0a43d70a170bf0b61e646ce597193d024da6ae6c917b2d61d
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The embedded URLs point to various PDF documents, likely intended to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/wix?keyword=example+of+avoidance+avoidance+conflict PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465006/normal_6054afb98d70f.pdfIn PDF document text
    • https://golotelarag.weebly.com/uploads/1/3/1/3/131382536/e112a9.pdfIn PDF document text
    • http://tubudemawaxoki.iblogger.org/norizu.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/5d1ba3da73b.pdfIn PDF document text
    • http://topekabur.iblogger.org/aiag_spc_manual_free_download.pdfIn PDF document text
    • https://xowimigijik.weebly.com/uploads/1/3/1/6/131637135/sevejugu.pdfIn PDF document text
    • http://jegepev.22web.org/amazon_business_model_case_study.pdfIn PDF document text
    • https://litodamun.weebly.com/uploads/1/3/4/7/134710511/fff2135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_601eaa9a4db1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393628/normal_5fec744d0832a.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/divikufifir/ruger_lcp_holster_with_extra_mag.pdfIn PDF document text
    • http://zezinoretebeper.rf.gd/proceso_de_absorcion_de_nutrientes_en_las_plantas.pdfIn PDF document text
    • https://457cefd1-268f-49c0-9ca4-ced5ac281e6b.filesusr.com/ugd/983758_ab409e00555d4821a4511232d65685ec.pdf?index=trueIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_543015fce18f486089106726f83e1f2e.pdf?index=trueIn PDF document text
    • http://boxemoje.epizy.com/47440439482.pdfIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_96e6467095aa486587f210d86dcf02e0.pdf?index=trueIn PDF document text
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_fd01328733c346d29da961a85a76612f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/agronomy_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_off0000fb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9E 5112 bytes
SHA-256: c0d79578d321cb701276329abd18cf0275310d2ef1e618c1443cb98bfc3a4979
font_01_sfnt_off00010d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D06 10376 bytes
SHA-256: 427a2eddc942d94969867ba418b65b4a348c07ee9648c5381bc61c3ed1397b88