Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5659807cb81499f…

MALICIOUS

PDF

75.6 KB Created: 2021-04-04 05:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 10964a906de6a5173069b7216b4748dd SHA-1: 898db7fece91e792fc40a5c6862cd3cb3b677788 SHA-256: e5659807cb81499fb83727ea4f5277f300c21e6d9a372851d7a518f3c5cc7b67
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting services, and is flagged as a link farm. The document body, though heavily obfuscated, suggests a lure related to software keygens, specifically 'xforce keygen autocad 2013 32 bit'. The presence of external URIs and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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/123?utm_term=xforce+keygen+autocad+2013+32+bit PDF link annotation
    • https://xomugewobi.weebly.com/uploads/1/3/0/8/130814749/jemaz-nodepejunus-jematufakoseg.pdfIn PDF document text
    • https://luwajunilekugo.weebly.com/uploads/1/3/4/7/134753683/masalalepijegur_dukijibazumul_bodopad.pdfIn PDF document text
    • http://winclean-shop.space/615710226991secn.pdfIn PDF document text
    • https://cdn.sqhk.co/silutoge/paogjPH/jipadubiduzovuja.pdfIn PDF document text
    • http://zosazufinur.mygamesonline.org/near_death_experience_research.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/eo7tieJ/43540102443.pdfIn PDF document text
    • http://fashion-deals.xyz/342768669c9wh.pdfIn PDF document text
    • https://petabururumeje.weebly.com/uploads/1/3/4/9/134902787/3464784.pdfIn PDF document text
    • https://seruvukajobal.weebly.com/uploads/1/3/4/4/134479042/1406266.pdfIn PDF document text
    • https://mogasijukunuv.weebly.com/uploads/1/3/4/0/134042787/xubozoxopixoruxopil.pdfIn PDF document text
    • https://mewejubakokexal.weebly.com/uploads/1/3/2/6/132681976/fuwiluvosapixo_fodejowowokujiv_pejikinazakefa_lufopof.pdfIn PDF document text
    • http://wewofif.scienceontheweb.net/355882602.pdfIn PDF document text
    • http://justamorem.com/xexil7tmma.pdfIn PDF document text
    • http://ogranifruit.space/9015347450sbvm5.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/jbvTjfJ/71356358881.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/how_to_reduce_tuition_fees_in_canada.pdfIn PDF document text
    • http://mevixonur.mywebcommunity.org/28237669223.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirorip/Cwhgxgh/justin_herbert_scouting_report.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/xomudufe/bomiru.pdfIn PDF document text
    • http://karokifewugasuz.onlinewebshop.net/mugalatagunetoxedowor.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/how_to_crochet_left_handed_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/50943475396.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_off0000e5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B5 5752 bytes
SHA-256: 04702d192107f86cbc7c6d7afe05e124773d6eb90a0c7da9c78bea412aeffd96
font_01_sfnt_off0000f96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96D 11596 bytes
SHA-256: 583ee9901e78e931cbb6cb1c201cfe9bce34a899522cde43316feae5bb863c85

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