Malicious PDF — malware analysis report

Static analysis result for SHA-256 1853d4bfdac5f4f2…

MALICIOUS

PDF

67.9 KB Created: 2021-06-13 23:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ae02464914b6c4b86b85e7cd9ce7a18a SHA-1: 68edeff86a840adf8baf4aa3ef220d90798092f6 SHA-256: 1853d4bfdac5f4f2073c6dc9b09162a0c1870d6034dc813ec295ddd38b3aab79
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a link farm with numerous external URLs, including one pointing to 'nomylo.ru', suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'credit appraisal' documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7936

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 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
  • 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://nomylo.ru/pbw?utm_term=dd+mukherjee+credit+appraisal+pdf+free+download PDF link annotation
    • https://gupimarozak.weebly.com/uploads/1/3/4/3/134350981/piwapimegazeji_gidodo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428341/normal_5fecfec0e7987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410206/normal_600b341c7d9ce.pdfIn PDF document text
    • https://vudemigubujesi.weebly.com/uploads/1/3/5/3/135300151/zifuxogi.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4403274/normal_60b5218bc96d7.pdfIn PDF document text
    • https://tebakoreku.weebly.com/uploads/1/3/4/8/134866173/vigaluxamolele_soxogegono_sukamujabekarof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405208/normal_60bc1b8b139c1.pdfIn PDF document text
    • https://kowojifab.weebly.com/uploads/1/3/4/6/134622532/2649194.pdfIn PDF document text
    • https://gisetokitalakak.weebly.com/uploads/1/3/4/6/134600310/0ebe4157c874f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489440/normal_6048f4a0df4b4.pdfIn PDF document text
    • https://gedokepapivit.weebly.com/uploads/1/3/4/4/134464903/wakekabemaxotunizuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369185/normal_5fc7d4d6a3f23.pdfIn PDF document text
    • https://runogobikekeg.weebly.com/uploads/1/3/5/3/135350887/01e7e73cb9d.pdfIn PDF document text
    • https://lefoxidegej.weebly.com/uploads/1/3/4/5/134526886/6698792.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://beratirupo.pbworks.com/w/file/fetch/144663018/ejercicios_adjetivos_posesivos_en_francs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f700e92-6c2f-4e5e-aa37-d57596c8e6d4/intermediate_microeconomics_a_modern_approach_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edf5eff5-5ce7-488f-8a7c-751b60afa597/how_do_you_say_doctors_appointment_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348c21c5-bf92-4da6-b26d-095d89509850/xareturalebokogusoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b109b372-b022-4b9a-b4cd-74eb1944b11b/sasubegawesavipaje.pdfIn PDF document text
    • http://saxonax.pbworks.com/f/eddy_b__tim_gunter_-_time_bomb_mp3_song_download.pdfIn PDF document text
    • http://sekodegaxex.pbworks.com/f/video_after_effects_pro_apk_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b65732d-57a2-44db-9776-b8c14a920cc9/67664125827.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 5508 bytes
SHA-256: f08dc51b71f692058644b76b45c4d9351029b6b3f890b73e5bf8d68696eabc26

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