Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2363f1022a6546a…

MALICIOUS

PDF

77.1 KB Created: 2021-03-10 05:44:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0bb5dbb249bc8ddc9b0880d6eb3b30d7 SHA-1: c9a125e3ab2fd8006b3fd8985324e5f19bb7f5bb SHA-256: e2363f1022a6546a00e8ddaf62e72f83ef2a82c393c7dea6942abd8cf9a76cc7
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the extensive link farm points to a deceptive lure designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • 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://druttle.ru/award?keyword=piano+classical+music+free+download+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446931/normal_6023dae12154e.pdfIn PDF document text
    • https://wajegeteb.weebly.com/uploads/1/3/4/8/134896445/6665730.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367617/normal_5fcb8f3722b57.pdfIn PDF document text
    • http://keborejozupe.22web.org/arista_light_font_free.pdfIn PDF document text
    • https://bevufivob.weebly.com/uploads/1/3/4/6/134669401/f242cacffc4.pdfIn PDF document text
    • https://bexajaburise.weebly.com/uploads/1/3/5/3/135345802/pozalutonularefe.pdfIn PDF document text
    • https://dekukosozo.weebly.com/uploads/1/3/1/0/131070054/13ca452346.pdfIn PDF document text
    • http://zujakupuk.22web.org/liniruw.pdfIn PDF document text
    • http://wowosuseje.22web.org/46192896531.pdfIn PDF document text
    • http://dujalubudekir.22web.org/reports_and_dashboards_salesforce_classic.pdfIn PDF document text
    • http://lofuzuwe.22web.org/128096875.pdfIn PDF document text
    • https://mirivibi.weebly.com/uploads/1/3/4/2/134234555/397652.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://perevis.epizy.com/geroguvapusumukegeza.pdfIn PDF document text
    • http://nedopukini.rf.gd/35592218934.pdfIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_4e1f8064345a4d3abfab9851b916e55a.pdf?index=trueIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_8e667863bd31487b953518aaad1aa3ff.pdf?index=trueIn PDF document text
    • http://weregoxo.epizy.com/how_to_write_epsilon_on_mac.pdfIn PDF document text
    • http://xevikosurozogin.rf.gd/155034158.pdfIn PDF document text
    • http://volajigatume.epizy.com/all_landforms_in_the_philippines.pdfIn PDF document text
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_ff35f17d97c24529852dc317ded71681.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_855fd37fa6e4472c9d355a76f0c330fb.pdf?index=trueIn PDF document text
    • http://nolutujurevovi.epizy.com/pupivunuseri.pdfIn PDF document text
    • http://zusewijoje.epizy.com/sabarimala_temple_images.pdfIn PDF document text
    • http://zotuxegusam.epizy.com/prime_factorization_christmas_tree_worksheet.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_4e438b2b5941465da1d1e9cca611bed1.pdf?index=trueIn PDF document text
    • http://denakisewir.epizy.com/nenirulesomumaji.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_off0000f135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF135 5396 bytes
SHA-256: b698dd922697781f96cece3e3b3eca85346772a8bb17d1946864c874b58511a5
font_01_sfnt_off00010389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10389 10200 bytes
SHA-256: 2c889de2573f6e802a7ed1ca83aeaf36816d70b66e2989d8353c26bb2a73d30d