Malicious PDF — malware analysis report

Static analysis result for SHA-256 33818b10049a658c…

MALICIOUS

PDF

65.2 KB Created: 2020-11-17 14:07:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: aba61c10d3ce2418eeda42424b1c4c1c SHA-1: 1f3f578a710b1b72f6f858ae7e99512e16fe6fe2 SHA-256: 33818b10049a658cfab3c8246148603172472900b68b5023508b1881a6c91786
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a medium-severity rule indicating it's a link farm on disposable hosting, and a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded URLs point towards malicious intent.

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 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.
  • 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://trafffi.ru/strik?utm_term=ashcroft+and+mermin PDF link annotation
    • https://retujesa.weebly.com/uploads/1/3/4/5/134529196/c2de569e.pdfIn PDF document text
    • https://wowujisalot.weebly.com/uploads/1/3/4/3/134349860/4fe918fc.pdfIn PDF document text
    • https://pelirexasi.weebly.com/uploads/1/3/4/3/134352860/vokaseke.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/pajifedudofakilegiw.pdfIn PDF document text
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/fasum-pemewenodelori-dejuvusimibuxog.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/be0770a.pdfIn PDF document text
    • https://jolefopasovoja.weebly.com/uploads/1/3/4/4/134402584/koxijava.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/tuzamada/eve_online_algos_fitting_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a22b59a8-9ea8-44ac-9932-478948009f9e/wwe_2k17_game_download_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/bridges_math_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/voremozegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb0a26d-8a2a-46b1-9124-93c0eccc6c24/bomimesomamakixis.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A3 5220 bytes
SHA-256: dc75bf5ca928fe5cfdec859b03522d82d3e4960d6ce1267b084db156a237ea6b
font_01_sfnt_off0000d639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD639 10076 bytes
SHA-256: cfa26012d613bb38939b1e8454dbd2f901e1b40180351ca3278026cf9bf200fd

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