Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce8bbc807937344…

MALICIOUS

PDF

81.0 KB Created: 2021-03-29 12:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fa5aa826297d44b4d76e099a305c0269 SHA-1: 6223df747c273405fda89d9d1a5bfa82af79ce47 SHA-256: cce8bbc807937344223024f62a6bae1c23fc6ec95064cbbdaf9a9f9bf18f7373
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded links pointing to various domains, many of which are identified as disposable hosting, suggesting a link farm or phishing lure. The primary malicious activity observed is the redirection to external URLs, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/wix?keyword=poseidon+and+medusa PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457006/normal_603f72c2cb7b1.pdfIn PDF document text
    • https://wumigativagulam.weebly.com/uploads/1/3/1/6/131637174/45935e0d561f85f.pdfIn PDF document text
    • http://walapapu.iblogger.org/55201358569.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449627/normal_600eb36362132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459322/normal_602d9dd1d4a9d.pdfIn PDF document text
    • http://loluxeloju.iblogger.org/business_analyst_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • https://ladufuvugekowek.weebly.com/uploads/1/3/4/1/134108614/texafaputoj_pepofukep_sawebojafakid.pdfIn PDF document text
    • http://lefofusi.22web.org/4836616017.pdfIn PDF document text
    • https://nasaperexi.weebly.com/uploads/1/3/5/3/135351481/lulitivisovuwosilole.pdfIn PDF document text
    • https://pivatebovuwize.weebly.com/uploads/1/3/0/7/130775292/e08db.pdfIn PDF document text
    • http://pavezala.iblogger.org/hand_bell_sound_effect_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xigavekokerir.epizy.com/power_electronics_engineer_salary.pdfIn PDF document text
    • http://viwajetomuzopo.epizy.com/36764641423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e231e69c-909e-4e4d-a9cb-123671605581/bepokogoripe.pdfIn PDF document text
    • http://jeranaxerobapil.rf.gd/steel_column_design_calculation.pdfIn PDF document text
    • http://tuwofexuguxu.epizy.com/minecraft_ftb_bee_breeding_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a741aa94-22d1-4423-8df4-4199ba7e1f90/sixen.pdfIn PDF document text
    • http://rovijog.rf.gd/68915355316.pdfIn PDF document text
    • http://wovumuwubimed.rf.gd/carboplatin_mechanism_of_action.pdfIn PDF document text
    • http://jufulejilola.epizy.com/salesforce_administrator_maintenance_exam_summer_19_answers.pdfIn PDF document text
    • http://wukevuwotud.rf.gd/rabiribemogiguwo.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_off0000f13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13B 4844 bytes
SHA-256: a676d8b5c9a12fbbecd310652d98e1c648c23f829a7d5733109c1558b68dfae9
font_01_sfnt_off000101a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 18932 bytes
SHA-256: 09014758c82ae3e57cf846dbf55bb86584e0f156d99f0c328e915ad364a81241

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