Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2bf79b728c2494…

MALICIOUS

PDF

73.5 KB Created: 2021-03-14 00:10:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: faeef2b7f6113086cf41a635e310032d SHA-1: 2fd6289572dc773a0f4f5d73e20ed1df8c6776b6 SHA-256: 2b2bf79b728c2494ec7798952ad23e64b6accdc7f4e0e275d6ee64d46578e665
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm designed to host malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The document's structure and embedded URLs point towards an attempt to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/strik?utm_term=thermador+oven+installation+instructions PDF link annotation
    • http://deromgroup.com/what_is_the_average_words_per_minute_typing_speedjtge1.pdfIn PDF document text
    • https://mumilupoj.weebly.com/uploads/1/3/5/3/135351188/golikom.pdfIn PDF document text
    • https://fiziwiminika.weebly.com/uploads/1/3/4/6/134686918/lagavid.pdfIn PDF document text
    • http://veronaital.space/bulletin_de_paie_gratuito9iw4.pdfIn PDF document text
    • https://zeberafuduzugag.weebly.com/uploads/1/3/2/6/132682167/1981036.pdfIn PDF document text
    • https://cdn.sqhk.co/texojijoraso/dhihdjf/fishdom_cheats_445.pdfIn PDF document text
    • https://maposege.weebly.com/uploads/1/3/1/3/131378999/6261217.pdfIn PDF document text
    • https://morutasatosode.weebly.com/uploads/1/3/4/3/134366393/jefobazekubag.pdfIn PDF document text
    • https://japowubameke.weebly.com/uploads/1/3/1/4/131483598/zitawis_gepilajoriv.pdfIn PDF document text
    • https://vobanugan.weebly.com/uploads/1/3/5/3/135340106/sapolobuwo.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/9749456480538kg0.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/oig5bCu/80397960208.pdfIn PDF document text
    • https://basavorulifa.weebly.com/uploads/1/3/4/8/134899730/vazanomevo.pdfIn PDF document text
    • https://rivupabageram.weebly.com/uploads/1/3/5/3/135323939/7766835.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gebukil/todubuvo.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/kelewekamuzoder.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/45232139970.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/coleman_powermate_1850_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/bootstrap_3_grid_psd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F9 5072 bytes
SHA-256: 7147b06f6f39157388f355d7af4009d53c6a130c367d08d72d3925b499a64190
font_01_sfnt_off0000e60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60F 10528 bytes
SHA-256: 7c6ae0f99ee07fb855084c8c6b4e17590915ce3f900286294ea23e446794edec
font_02_sfnt_off00010a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A36 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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