Malicious PDF — malware analysis report

Static analysis result for SHA-256 da40280621031f8b…

MALICIOUS

PDF

82.0 KB Created: 2020-12-19 14:22:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d5261c924ca52b2be16945af13a8ed4c SHA-1: 80b8ba2a9979c8ec1c404c01ceece067ad7322ef SHA-256: da40280621031f8b9e36971aed119d14a742dffa1db90d2695c6294867e9591a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to S3 buckets and other cloud storage, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://traffking.ru/strik?utm_term=back+to+life+machine+amazon', is likely a malicious redirect or phishing lure. The PDF structure and embedded content indicate it's designed to drive traffic to external sites, potentially for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/strik?utm_term=back+to+life+machine+amazon PDF link annotation
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/6987563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485702/normal_5fd7dad67540a.pdfIn PDF document text
    • https://fikupekuxugo.weebly.com/uploads/1/3/4/6/134612485/zikigimebonipab.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/benuka/new_south_movie_2018_mp4_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/35647687582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5ca414-0f84-4d5f-bf9c-109dac909990/34428236277.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/96168970274.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f8872cf09257bd6c6ae2/t/5fcdb9e8d235d37878e4e92d/1607317992756/ps4_game_metal_slug_7.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/punamulakekek.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/bindiya_goswami_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/words_that_start_with_wam.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/calvin_and_hobbes_full_collection.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C7 5012 bytes
SHA-256: 4d003d4e5c7a2724800b902e100df615047541f98007c96b760f6c8add6e991c
font_01_sfnt_off000101bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BF 10408 bytes
SHA-256: 61fd29a6e020c3a2bd14b61bcb07e21f1bde732671764721df2f1d06819fd22b
font_02_sfnt_off00012560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12560 16432 bytes
SHA-256: 3b75de8373c068df626e76dbfb33529afe74ed1d7a4ebd87ba70b20fff67b3c2

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