Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e107ecfdd36970b…

MALICIOUS

PDF

73.0 KB Created: 2021-03-30 02:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 04ffc097f062a9ca5723f7afaf9defda SHA-1: b15ff02ccd93d005832b7b498a7bb9465f6f89e4 SHA-256: 6e107ecfdd36970b508ce0aab39e3fe80747cb936f0d6e3a553685e784bf2080
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary one pointing to 'botokaw.ru', likely serving as a lure for users interested in "root causes of poverty". The PDF structure itself is also flagged as a link farm on disposable hosting, further supporting a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://botokaw.ru/award?keyword=root+causes+of+poverty+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474722/normal_603fc22ab5633.pdfIn PDF document text
    • https://cdn.sqhk.co/dajusonas/ie0CjjP/difazodelikipu.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/faAxGhj/xuwanikuvotaxewajareruzil.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/wesasoridotagugik.pdfIn PDF document text
    • https://cdn.sqhk.co/sokaxopoje/1gexhji/bipikoduvowezobomivule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_600baa0fdeb8a.pdfIn PDF document text
    • https://jawonuvanez.weebly.com/uploads/1/3/6/0/136021807/39d7954459.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501054/normal_5fcba9e02d295.pdfIn PDF document text
    • https://funogefoxareso.weebly.com/uploads/1/3/4/0/134041001/nifigurinolod-gudeligoresow-vixumavobanaf-zinobiku.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/xewamotewaw-deligajasokomu.pdfIn PDF document text
    • https://gilezetekeno.weebly.com/uploads/1/3/4/5/134596926/zijepigixaguvil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421051/normal_5ff4d126200e1.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/hbjkzye/74868681283.pdfIn PDF document text
    • http://nulatapukedu.scienceontheweb.net/anatomy_book_for_mbbs_1st_year.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/bewibiwat/sweet_pea_regular_font.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/static_gk_capsule_ibps_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/61076121472.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/13018631458.pdfIn PDF document text
    • http://tikomiwewo.atwebpages.com/brain_teasers_questions_with_answers.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_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 5284 bytes
SHA-256: 4ffc31a49ef457208d88b77beb5ad80c2f6ca667f739d0ad23818bebe98b529e
font_01_sfnt_off0000f2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C2 10604 bytes
SHA-256: a3659f8eb4b4011783d4616aaf8661b87e88930d613890f6ca000577633be678

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