Malicious PDF — malware analysis report

Static analysis result for SHA-256 0688edd5194706f3…

MALICIOUS

PDF

74.6 KB Created: 2021-03-19 08:07:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 844a67387c3f4a22c3d0669bb5b0671b SHA-1: 2265d1e901e06865b7f6570c677692c11c101fe0 SHA-256: 0688edd5194706f3dbd9ee1c16af9f87abb678a42d0bd28d8f9bc3347e795a19
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a link farm, a common technique for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://midufefew.ru/strik?utm_term=porsche+cayenne+maintenance+costs+australia PDF link annotation
    • http://polobasopika.mywebcommunity.org/calendar_girl_audrey_carlan_series.pdfIn PDF document text
    • http://ribavid.medianewsonline.com/69036438881.pdfIn PDF document text
    • http://sijiwepi.mypressonline.com/badijisawifafujepi.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/how_many_questions_in_70-761_exam.pdfIn PDF document text
    • http://kijumubafenu.mypressonline.com/42436017488.pdfIn PDF document text
    • http://begedotupatato.66ghz.com/mipur.pdfIn PDF document text
    • http://luzovimivulurip.22web.org/concepto_de_anuria.pdfIn PDF document text
    • http://neridofufuleteg.scienceontheweb.net/fowiguzozifowipufo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/992dfa44-7178-4899-a6fb-2af6f9c3ac5e/romeo_and_juliet_statute_florida.pdfIn PDF document text
    • http://vipuzala.myartsonline.com/59833836636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b6c781-fd18-4487-a25e-6b709554702d/rawhide_harley_service_department.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/530b1d9f-36c1-44fb-abdc-249f79d21c76/goliath_5e_wikidot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f8b2d49-f401-416f-9d18-8d02f96591ef/geganeratotumoniwivugog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3df4a922-ee67-481b-a025-bf64c9c3b099/28643055964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caaf7d05-9a76-446f-aa19-23b8e8d276df/altered_carbon_season_1_episode_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/40064687496.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/king_lear_themes_litcharts.pdfIn PDF document text
    • http://zukuwegafedes.epizy.com/15994344362.pdfIn PDF document text
    • http://xofedebowin.epizy.com/42449122345.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/anji_aku_menunggumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2691538-76af-4a52-8492-d5b1f0d565e4/lewis_structures_of_atoms_worksheet_answer_key.pdfIn PDF document text
    • http://mopezit.epizy.com/cookery_classes_listening_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/jibuborafededatazevetolu.pdfIn PDF document text
    • http://taguloxutenafol.myartsonline.com/mis_deseos_feliz_navidad_lyrics_michael_buble.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/asus_router_rt-n12d1_default_password.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_off0000e656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE656 5144 bytes
SHA-256: fb9a79dc0bdadea7856d9fe7a40c138599140f40b5e3201764229cbfafc71e69
font_01_sfnt_off0000f7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B0 10800 bytes
SHA-256: ad1e0c8f22205a9fb3858301c98c34f3defc9ff1d3bf852e46c82689f4632247