Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2225b85b4baffb6…

MALICIOUS

PDF

68.3 KB Created: 2021-03-05 19:53:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: f45d0a301e2433bfb5c5fa36ca48b76f SHA-1: 279a64282170f65d584dba06bc29496bab67938d SHA-256: f2225b85b4baffb61e358505fe5c78a0cb79043604aca43303f04c659f09da68
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. The embedded links likely serve to redirect users to sites hosting malware or engaging in fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://xezojetit.ru/123?utm_term=video+de+medios+de+transporte+terrestre+para+ni%25C3%25B1os PDF link annotation
    • https://lojigimab.weebly.com/uploads/1/3/0/8/130814508/derijumozokudir-levoju-suderikejumi.pdfIn PDF document text
    • http://bukuminuwakub.mypressonline.com/82213560876.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/sovudokijikewana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461481/normal_5fd1cb2d3dd20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466408/normal_5fd04cae9d514.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378599/normal_5fe1b0b21cf57.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/cissp_study_guide_third_edition.pdfIn PDF document text
    • https://dunofedipusafo.weebly.com/uploads/1/3/4/4/134477286/datunabek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/aviary_apk_full_cracked.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/98712559106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24bee1be-ad61-4b93-a7bb-41cf6a53d9ab/zuvenavabaxajopobadeduk.pdfIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_a9be873685054386a04a2ebc670cf470.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1628db4c-d30f-48a5-8a3e-3dadeb25171a/nourishing_traditions_book.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/64306463573.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/hodder_cambridge_primary_science_stage_3_answers.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_be68d180fbb24c90ad949ad7708abb99.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/bandcamp_album_er_firefox.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_off0000cc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8F 5248 bytes
SHA-256: 93500c65583b7d7b4aa05b9cbbfc7122c5609ed92c42b298508dd0bd8b300730
font_01_sfnt_off0000de0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0F 10868 bytes
SHA-256: 9d9de71348837f7486fa7f49a9ea823b94e4e1c7a358fa99ed8dbc92078eefb4

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