Malicious PDF — malware analysis report

Static analysis result for SHA-256 502e34d3bc748866…

MALICIOUS

PDF

67.8 KB Created: 2021-03-24 09:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a8e0f502bd8de01ba0e55245fb181dd8 SHA-1: ac7ed918cc252cce0264e39cc60a793a0483930f SHA-256: 502e34d3bc748866391d6fdec03ee906a95aaa31d055f35618e0b5a67f22ccfa
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. While no scripts were explicitly extracted, the presence of numerous external URIs and the 'SEO Link Farm' heuristic indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/wix?keyword=pacemaker+american+government+answer+key+pdf PDF link annotation
    • https://mumerigowijegap.weebly.com/uploads/1/3/4/7/134771458/3048949.pdfIn PDF document text
    • https://rofunepez.weebly.com/uploads/1/3/2/7/132710772/debal_gavavepufit_faragijunun.pdfIn PDF document text
    • https://kekugijofer.weebly.com/uploads/1/3/5/3/135321092/be5225e435.pdfIn PDF document text
    • https://lamonide.weebly.com/uploads/1/3/4/0/134096931/481a51065f.pdfIn PDF document text
    • https://xapebetilozeze.weebly.com/uploads/1/3/0/8/130873864/wepawoxux-pojokorebuvibur-gojawesowibasa.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/how_do_you_change_the_4_blades_on_a_honda_lawn_mower.pdfIn PDF document text
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/2e5d5c.pdfIn PDF document text
    • https://pulosonimoge.weebly.com/uploads/1/3/0/7/130739093/fea8257f.pdfIn PDF document text
    • https://bateworolod.weebly.com/uploads/1/3/4/3/134315912/3cf59d.pdfIn PDF document text
    • http://loziwazekon.medianewsonline.com/65433157159.pdfIn PDF document text
    • http://ganedoxumizaj.sportsontheweb.net/revanubosodilimavewoxa.pdfIn PDF document text
    • https://padukasafif.weebly.com/uploads/1/3/4/4/134404544/c3a78.pdfIn PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/futulikij-kirumeguwut-datakafexe-jawupaxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gutolagewu.rf.gd/sijuvefagirapilagedufis.pdfIn PDF document text
    • http://pedamodaw.onlinewebshop.net/what_are_the_12_steps_for_drug_addiction.pdfIn PDF document text
    • http://xixujoteb.epizy.com/xitanoxuxipasuzuxipixe.pdfIn PDF document text
    • http://winigoset.rf.gd/mathematics_syllabus_d_book_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc099b2-6e23-4542-8bb0-46360c17e3d9/the_sign_of_four_espaol.pdfIn PDF document text
    • http://natomilalusirof.rf.gd/around_the_world_in_80_days_1956_movie_poster.pdfIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_1c6349862b9945da87d5fdfb248bb94a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c17944e3-70d7-4b85-9f42-6e6e3000fe6e/12603911628.pdfIn PDF document text
    • http://jawuwibunoropo.atwebpages.com/boundary_element_methods_in_solid_mechanics.pdfIn PDF document text
    • http://rojomiv.rf.gd/kadagimodavusezop.pdfIn PDF document text
    • https://2a6c20f5-091f-48b5-a5be-bf749919b1f6.filesusr.com/ugd/3794ad_3a4b71efa63a440b8c60be66eaf781d6.pdf?index=trueIn 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_off0000ca4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4B 5760 bytes
SHA-256: 728069ea83a46cca12c36059f93c4d3965bf559f077a07ed42a51d113efda1a2
font_01_sfnt_off0000ddfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDFB 10432 bytes
SHA-256: 81d63afe3cc70d5b0e3850771ce424ebb5b24bcca4d3f49e951b287a03099492