Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a889172b11cde1…

MALICIOUS

PDF

67.2 KB Created: 2020-12-16 23:20:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fcd6d71c7bcae559ddefa3d3703834ba SHA-1: 915d4af3a4cd6c244741f20ec93cb9e9f51164ac SHA-256: b3a889172b11cde1d14777b1a5803546b37c82477ada95d3f6c1521ef275f69e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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/strik?utm_term=ccna+lab+manual+pdf PDF link annotation
    • https://zazetafulunemu.weebly.com/uploads/1/3/4/5/134599809/zezijalonoj.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/2aa778649b8.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/bogokawemem_najijisemi_jitet.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/mupami-pasakuju.pdfIn PDF document text
    • https://xiforamuti.weebly.com/uploads/1/3/4/6/134611992/8219028.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/3b246.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/nerugiraxura/nikovilavufekozoxesowoso.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/90500307030.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/all_media_contact_number.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/baby_delivery_video_in_hospital_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/cedula_de_identificacion_fiscal_formato.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/dexip.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/zujusinufevijititebali.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/arrow_of_janissary_g2k.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

Related samples 4

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_off0000c998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC998 5072 bytes
SHA-256: 8b065bf91ec4fe991835d6a520f47955fdc939a4d9273a381fcc2953d50f91ed
font_01_sfnt_off0000dac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC3 10496 bytes
SHA-256: 3f4e98a73bf78f255d2331003938507d71e9d46ff2fd700cda54c62691e6dd5d

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