Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbeef38067c38799…

MALICIOUS

PDF

77.3 KB Created: 2021-02-15 11:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 234c25fcda627fdad0eff71d2b0c9311 SHA-1: de55afdabd92b387d75e9007a970ceccc86d4136 SHA-256: dbeef38067c38799e32c9e2c1ff2435f30fc19415f80bd56e6dbb06901d56dfb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, further supporting a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=how+can+you+swing+a+baseball+bat PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373271/normal_5fc6116b8840a.pdfIn PDF document text
    • https://xojutezakiveze.weebly.com/uploads/1/3/5/3/135318362/senemob.pdfIn PDF document text
    • http://koburokigijufu.iblogger.org/89150891140.pdfIn PDF document text
    • http://podarokinsta.online/coin_master_hack_2020_without_verification8o1ma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456982/normal_5ff6656430c58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450248/normal_6017c54aa6f01.pdfIn PDF document text
    • https://tulivugid.weebly.com/uploads/1/3/4/6/134607321/7015889.pdfIn PDF document text
    • http://rajedat.iblogger.org/bahubali_part_1_telugu_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/lucjdhd/blaze_of_battle_hack_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374185/normal_5fc917d53449e.pdfIn PDF document text
    • http://choosenews.space/34141765041ejlp4.pdfIn PDF document text
    • http://pinerapidsrr.com/xapopijuxeginelulepugifofe5w98.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/4kaeihh/syfy_tv_shows_2000s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_6014bfebf0b12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_5fe7846676c77.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/gyiaHMp/31046233060.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/1qf2jUe/jajipexorobofejavutevaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://banolepepo.epizy.com/99485806958.pdfIn PDF document text
    • http://rututovabin.rf.gd/27482839340.pdfIn PDF document text
    • http://kalogoraretupo.epizy.com/nelikabitutusosikaxijewa.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_off0000f16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 5168 bytes
SHA-256: fc416d1c4672c999ffc2ab5dcabfbc675f3f3182539d3b0158e502749039913a
font_01_sfnt_off00010331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10331 11084 bytes
SHA-256: a6d7073cb5cf1a46bad2fb1db7c9a25d22bac2df600e59d97c2984888a9c143f

Open this report in the interactive analyzer, or submit your own file for analysis.