Malicious PDF — malware analysis report

Static analysis result for SHA-256 be69d6c720e4fb19…

MALICIOUS

PDF

82.4 KB Created: 2021-02-18 19:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0d31d340c7b1aee60609fa00c9f42f3c SHA-1: 467ba3e1bc5119754e9e1aa7c520411d85c26171 SHA-256: be69d6c720e4fb19b7e7ce38aef85321238300ce37d1bdc8861254079cf30170
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or known malicious redirectors. The document body, though corrupted, suggests a lure related to 'basic electrical engineering books pdf bangla'. The presence of ML and ClamAV detections, along with the link farm heuristic, strongly indicates malicious intent, likely for phishing or distributing further malware.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=basic+electrical+engineering+books+pdf+bangla In PDF document text
    • https://vabakapis.weebly.com/uploads/1/3/1/4/131453405/zujuzajikivinap-fokuvebep.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/ibgggfE/horizon_forbidden_west_gameplay_ps5.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/wmOIXih/popular_classical_music_spotify_playlist.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/jeiboYk/ritezugadijepum.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/ijhar8n/64815261915.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/iSihjbG/gejemutalomutewal.pdfIn PDF document text
    • https://takoremitivo.weebly.com/uploads/1/3/0/7/130738963/9678740.pdfIn PDF document text
    • https://petugaxuw.weebly.com/uploads/1/3/5/3/135397026/1390950.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/idgjm1k/60813347931.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
    • http://bumosutu.rf.gd/7706838156.pdfIn PDF document text
    • http://dorufuta.epizy.com/554740046.pdfIn PDF document text
    • http://renowuvix.epizy.com/zetabewawowisebi.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/bardam_s_mettle_guide.pdfIn PDF document text
    • http://nivosifif.rf.gd/kasarian_ng_pangngalan_worksheet_samut_samot.pdfIn PDF document text
    • http://tunopezarogex.epizy.com/29345476293.pdfIn PDF document text
    • http://bapatan.rf.gd/coin_collecting_guide.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 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_off0000f568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF568 5364 bytes
SHA-256: 7eb3f12721fcdfdb4f78b2da1dd924c472ed551cea0adb10db35a14ababbe82b
font_01_sfnt_off000107a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A1 11324 bytes
SHA-256: 7571b69db6fc348bf7505240f38da6f8a60be7cef24358faf00335a0cd3df5cf
font_02_sfnt_off00012e44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E44 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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