Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9a89806d5b24ca2…

MALICIOUS

PDF

69.5 KB Created: 2021-01-12 10:38:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 640e52a9cc75fbc93ce31fadc3e6a05a SHA-1: 8050961b7af308d032d980830cc0b27f12b8b15e SHA-256: f9a89806d5b24ca2105509c47b25684badf72250c30be1e189d52fd6f5efa99d
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it is a link farm and a lure for a password-protected archive, suggesting a phishing or malware delivery attempt. The embedded URL and the ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to a "Kyocera command center login", likely a pretext to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffset.ru/123?utm_term=kyocera+command+center+you+cannot+login PDF link annotation
    • https://cdn.sqhk.co/zupuguvawaj/gcgeggQ/wimivabixutigekezetalemop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370307/normal_5f914e440a1be.pdfIn PDF document text
    • https://site-1174611.mozfiles.com/files/1174611/lezusenerefinubumimin.pdfIn PDF document text
    • https://site-1203447.mozfiles.com/files/1203447/crazy_for_speed_2_game_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387819/normal_5f8de69eba5d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484804/normal_5fc18ab3a78f6.pdfIn PDF document text
    • https://monirazosakazux.weebly.com/uploads/1/3/5/3/135316997/2601363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469841/normal_5fb588a0198e3.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/15402.pdfIn PDF document text
    • https://site-1180454.mozfiles.com/files/1180454/pictoword_level_43.pdfIn PDF document text
    • https://cdn.sqhk.co/munenetifu/SQP8gMs/the_polytechnic_university_of_hong_kong_address.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/bupaxomu/population_dynamics_ecology.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/ada_guidelines_2018_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/giduzolimatonodimegij.pdfIn PDF document text
    • https://www.manualslib.com/manual/1020027/Kyocera-Ecosys-M6035cidn.htmIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD114 5152 bytes
SHA-256: d4e7fa0858505743b54318cfd200d4ff00ac46f77d04f786ea76d470f2b1f233
font_01_sfnt_off0000e297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE297 12116 bytes
SHA-256: 0782f355d564fd85a239abe6d099985dc47c6f1a51380470bb9d4a06978e8d3a

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