Malicious PDF — malware analysis report

Static analysis result for SHA-256 6353ae9bdaad89f8…

MALICIOUS

PDF

91.1 KB Created: 2021-02-16 09:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0d4324b29663538316de7289567ec540 SHA-1: b8635a7325192d143b03c4f58d6b6db306ba0aea SHA-256: 6353ae9bdaad89f81f394ee9c538bb26b2d2afaa3a98f2411c4adbf25a5d8c18
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam operation. The embedded content appears to be junk data, suggesting the primary purpose is to redirect users to malicious or spammy websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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
  • 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/wix?keyword=1991+palomino+pop+up+camper+manual PDF link annotation
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/palujojekorivasini.pdfIn PDF document text
    • https://vujilesozigo.weebly.com/uploads/1/3/4/0/134042384/4174091.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/3808836.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/bohdhge/1762104545.pdfIn PDF document text
    • https://kozowesojufeg.weebly.com/uploads/1/3/4/7/134717080/dosebutugixaf.pdfIn PDF document text
    • https://zesoxomilojul.weebly.com/uploads/1/3/4/0/134018604/b81a0e6361284aa.pdfIn PDF document text
    • https://cdn.sqhk.co/kobadaxo/aJihhgf/45478506296.pdfIn PDF document text
    • http://003-center.ru/5648597316368aph.pdfIn PDF document text
    • https://tuxuboninivufos.weebly.com/uploads/1/3/4/4/134478209/vamuv_zexilazet_mugojasopato_dujekif.pdfIn PDF document text
    • https://xabisipejerifo.weebly.com/uploads/1/3/4/6/134634854/21f1187911f1ac0.pdfIn PDF document text
    • http://autocredit.moscow/griseofulvin_side_effects_in_dogs6bkwz.pdfIn PDF document text
    • http://wipababotuzuke.iblogger.org/arsene_lupin_la_comtesse_de_cagliostro.pdfIn PDF document text
    • https://cdn.sqhk.co/zilidadakole/ifTggSI/70416045400.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bilunijo.epizy.com/46771808255.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_off00011a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A22 5012 bytes
SHA-256: 4ccc3ed73ccfa3559c3fe77fbe0af766f38787bc9903371e25b348e450019c5c
font_01_sfnt_off00012b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B20 17012 bytes
SHA-256: e7659c28a9229c0449b98831bc2d46c2d04348ff39965ac20935e36d5ec98e01

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