Malicious PDF — malware analysis report

Static analysis result for SHA-256 3693f3ca6b1191f6…

MALICIOUS

PDF

94.8 KB Created: 2021-02-11 23:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 9034c978c66e6a1c6ca5955db0edbc0b SHA-1: 26dd01f0e9613f87e5058387b515fdd7193fe2f8 SHA-256: 3693f3ca6b1191f6a93ea267bb18df342698222a073b5ac631f4f92bc6217c29
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to link farms on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of external URIs points to an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://leonvi.ru/wix?keyword=diane+borchardt+movie PDF link annotation
    • http://jejunobu.iblogger.org/classification_report_precision.pdfIn PDF document text
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/xotumuru_sepinelunewim.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/KjgJUET/reigns_game_of_thrones_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/Ln2zheL/prison_break_season_1_episode_1.pdfIn PDF document text
    • http://fegitodepepax.iblogger.org/zeselegalakiwemana.pdfIn PDF document text
    • https://fezemopozopedet.weebly.com/uploads/1/3/5/3/135326879/vivexufiba_joraguw.pdfIn PDF document text
    • https://cdn.sqhk.co/gevajoke/ZAfoFpS/motafelixoman.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/wojizetama.pdfIn PDF document text
    • https://kudezugomolalu.weebly.com/uploads/1/3/5/3/135331411/rapimidijav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://repafow.epizy.com/bugtong_filipino_riddles_with_answers.pdfIn PDF document text
    • http://fagufobukabovu.epizy.com/67959530318.pdfIn PDF document text
    • http://veguxakafopuvix.epizy.com/56148755272.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/gevovoxozaratujaxunegowo.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/xubujo.pdfIn PDF document text
    • http://xogebaf.rf.gd/agent_carter_full_movie.pdfIn PDF document text
    • http://nokemufebevezo.rf.gd/angularjs_send_form_data_json.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/south_america_map_blank.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_off0001387d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1387D 5168 bytes
SHA-256: 9ec3124ba5d92b1c5c12baa0c9b102002cdd74e3f7b92ae05f4dc6f0d2c65799
font_01_sfnt_off000149eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149EB 10640 bytes
SHA-256: 08c4aa43a4e378c6d1421dfd33b5c154dbce4f09bf46fd6d75fdc294e092d007

Open this report in the interactive analyzer, or submit your own file for analysis.