Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e46c38197c661d…

MALICIOUS

PDF

75.9 KB Created: 2021-02-24 22:31:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 655aba1ab49b5a1d46618fb7b370365c SHA-1: 960a95a4b92458fdda6d9a3497e68a63d2262394 SHA-256: e5e46c38197c661dc988c928465fa5d857ec5541b7fe9199696dd8ca939c8157
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, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or phishing sites. While no scripts were explicitly extracted, the nature of the link farm suggests it could be used to deliver further malicious payloads or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=pathfinder+iron+gods+pdf PDF link annotation
    • http://lnstagramverifiedbadgeservice.com/wifuvepulawalajosanetepalx7rm.pdfIn PDF document text
    • http://sibuvre.com/bhajan_aarti_ringtonefmxyz.pdfIn PDF document text
    • http://akvatehnika74.ru/who_are_the_main_characters_in_tales_of_a_fourth_grade_nothingh2ili.pdfIn PDF document text
    • https://sozejaras.weebly.com/uploads/1/3/2/6/132695734/bojosoperinaditimago.pdfIn PDF document text
    • https://webakutukulufu.weebly.com/uploads/1/3/2/6/132683024/0a748273fd4.pdfIn PDF document text
    • https://rexekimat.weebly.com/uploads/1/3/4/0/134017736/vezekezebetege-rapinegowuni-narivipefad-tifeluduxu.pdfIn PDF document text
    • https://totovipuvo.weebly.com/uploads/1/3/2/7/132740708/66e4023c18.pdfIn PDF document text
    • http://palitra-cveta.ru/tenses_worksheet_for_grade_4_with_answersyyui0.pdfIn PDF document text
    • https://katesagi.weebly.com/uploads/1/3/4/8/134864962/1371038.pdfIn PDF document text
    • http://greyfruit.space/focusrite_scarlett_2i2_tutorial_espaol3al9j.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/foundation_isaac_asimov.pdfIn PDF document text
    • https://farumurul.weebly.com/uploads/1/3/5/3/135326432/8478033.pdfIn PDF document text
    • https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/zasexe.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/25098627368.pdfIn PDF document text
    • http://sethel.xyz/vunadixebikikezyxie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nobuxuka.epizy.com/is_it_illegal_to_have_fake_reviews.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/rubutigogifijafenonuji.pdfIn PDF document text
    • http://wuwemeno.rf.gd/itunes_for_windows_10_for_free.pdfIn PDF document text
    • http://zunakaduwuba.rf.gd/6844382277.pdfIn PDF document text
    • http://litorow.myartsonline.com/simple_russian_grammar.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_off0000ecbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBB 5272 bytes
SHA-256: 4a6b1bd57f73b0ac2d75f9533eb20be5503c13c557778ea3895f3c8d9315c2c2
font_01_sfnt_off0000feab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAB 10380 bytes
SHA-256: f75706e949fcffb2a2c8a7e983912364bcdea2cd97fd07d319c9079f7c7853bb

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