Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbaf48242c4f77b2…

MALICIOUS

PDF

104.0 KB Created: 2021-03-13 16:20:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 96552f83a1299f9db7088d95718febf2 SHA-1: c29fa28553cf299205b05db970522bb1edcd48e3 SHA-256: cbaf48242c4f77b2c73cd8566d06fbc9dc1d2712fdeb7137273dbee5b8c58b15
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 flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with a primary suspicious URL pointing to 'jottigo.ru', suggesting it's designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document is part of a network of disposable hosting sites used for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jottigo.ru/strik?utm_term=psalm+23+1917 PDF link annotation
    • http://d-youtube.com/99714257026v2tme.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403952/normal_5ff13e787a21a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494160/normal_5fd66f449d6f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411219/normal_5ff9a3e80e911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5fe6baa16abaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415531/normal_60450cf1b1538.pdfIn PDF document text
    • http://fowagovujag.22web.org/43151995809.pdfIn PDF document text
    • http://nimolebefiv.22web.org/61226042667.pdfIn PDF document text
    • http://com-connexion.xyz/23321400648zckd9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xanojeja.rf.gd/xuror.pdfIn PDF document text
    • http://kujafugakare.epizy.com/suwavagoxubajuzavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ace964d-ba67-4524-b310-1ea960cde943/rugoxeru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df2439ab-2f6d-4355-8c0b-e5792ac9b3f9/who_are_the_norse_gods_and_goddesses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81087cc-4681-4d54-a9a1-cc20f85ea9ae/10399331254.pdfIn PDF document text
    • http://xefujexomige.epizy.com/black_and_decker_lst136_trimmer_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b535c1-7711-4497-9536-be8c1895964e/vosunisim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0569c4bc-0e1b-4460-9a12-a163a6fc6212/buvetadirabes.pdfIn PDF document text
    • http://dilalixurapa.epizy.com/44712629719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d702523-514e-4e7a-90af-148a6d1ff560/what_grade_is_a_2.9_gpa.pdfIn PDF document text
    • http://vixuzuvubus.rf.gd/sikesidamafibineka.pdfIn PDF document text
    • http://sosagid.epizy.com/android_programming_language_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd2d7f57-4272-4bce-892f-b2b704c5ff3a/euro_truck_simulator_2_1.34_crack_free_download.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_off00015c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C46 5320 bytes
SHA-256: 980a98bf1b576cf3c54f3c83920455cd4e39cd21d5bcbe5226d40115490813b1
font_01_sfnt_off00016e53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E53 10656 bytes
SHA-256: 5f1e44cf0a8fcc3a8d44edc5a595c83f2d591e9b9bfe1e0e3cc92ee837952c34

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