Malicious PDF — malware analysis report

Static analysis result for SHA-256 babf7b75e8c93a07…

MALICIOUS

PDF

74.0 KB Created: 2021-02-27 00:34:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 92e033c3426e10a7a51f0697c531b709 SHA-1: 0f34eb25dd3457123eacf1b399b505f3f555e760 SHA-256: babf7b75e8c93a07ac6df04e43800d32750a92d858aad5206b887737af9841fa
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to redirect users to potentially harmful sites.

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://pelibifir.ru/award?keyword=glenfield+model+60+aftermarket+stock PDF link annotation
    • http://best-store.club/kilulusekuwunij2jmn.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/tWhesia/18750660159.pdfIn PDF document text
    • https://zaxixeresez.weebly.com/uploads/1/3/1/8/131871416/digaxirufol.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/hfjgglk/204701414.pdfIn PDF document text
    • http://trenolgia.buzz/soundlogic_xt_buddy_speaker_review07sh3.pdfIn PDF document text
    • https://geliwesirodired.weebly.com/uploads/1/3/1/3/131382982/4c5ba69bf3fa.pdfIn PDF document text
    • https://gaxipisida.weebly.com/uploads/1/3/4/2/134267022/lulibufatoxe_temesumo_rimunuzibowixa.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/jcib8c4/food_wars_season_3_dub_dvd.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/hckjhWV/renaissance_ap_world_history_definition.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/jobavo/skyscan_clock_28600.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/ample_guitar_f.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/best_external_microphone_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/20472426517.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/migovadolas.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/acls_study_guide_5th_edition.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_off0000e281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE281 5556 bytes
SHA-256: 9ee956579af51854d90820aed20677cead30d41cccbc4895f86e5d62a4c69c3c
font_01_sfnt_off0000f555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF555 11036 bytes
SHA-256: 4ba16055f158212724bab0ef512b8d66b3ecc5b1ca47411b66e87dc4c7cd58d5

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