Malicious PDF — malware analysis report

Static analysis result for SHA-256 d480d14f14082c41…

MALICIOUS

PDF

73.7 KB Created: 2021-01-21 04:29:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d6303751ec0470e86f8dae7deccaaf48 SHA-1: ceb18c2f261caf627b39c42ddc0ac3ee4aaf59f4 SHA-256: d480d14f14082c41b65099d4c566f0af3bbe099314cac139119805a199dfb8b1
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic PDF_SEO_LINK_FARM indicates the presence of numerous external links, with one prominent example being a URL hosted on 'bologen.ru'. While no scripts were extracted, the document body's deceptive title suggests a phishing or social engineering attempt to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=usa+softball+rule+book PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416923/normal_5fc1a41c477d5.pdfIn PDF document text
    • https://janaravepok.weebly.com/uploads/1/3/4/8/134886337/buzezakadab_datutowopajuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5fbb92a13471f.pdfIn PDF document text
    • http://duvazejezirofid.22web.org/automata_formal_language_theory.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468814/normal_5fbae48bc01cb.pdfIn PDF document text
    • https://domolijetokuv.weebly.com/uploads/1/3/0/7/130738933/safewevaduzisi-zepumudetuxebik-guvigivipe.pdfIn PDF document text
    • https://womizanoxagas.weebly.com/uploads/1/3/1/6/131607010/2655208.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465919/normal_5fc44ffc07ca0.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/lisujonawififabib.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/xutomoxu/explosion_sound_effect_for_dance.pdfIn PDF document text
    • http://renaxodemebi.rf.gd/10377534525.pdfIn PDF document text
    • http://webekilijonelew.epizy.com/tutijataxutija.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/weragirefutibelasabe.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/38007723830.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/70061414294.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/nidexesopadimobokuni.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/buscar_mi_celular_robado_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/reported_speech_imperatives_ppt.pdfIn PDF document text
    • http://punegejofuj.epizy.com/capitol_reef_national_park_map.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_off0000e524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE524 4956 bytes
SHA-256: a6ab697de90f6e8dfbdbd077395da759157654c7f89fb5187cc92f03397639a0
font_01_sfnt_off0000f612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 10384 bytes
SHA-256: d19f1a61b73c41639710d3ac659ea2b44e5a8c7966f1fcff8a75d33508866de2

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