Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32a00bdac0ac9d6…

MALICIOUS

PDF

100.3 KB Created: 2021-03-11 08:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 55b06a8a6f090dc98ff0a3d5ea48f879 SHA-1: b027b6d4eb0820fe1176e505b38820a54e8f981d SHA-256: a32a00bdac0ac9d6c419581bfad0bfa1102b11dcdc4abfc2ae3365c602275029
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of numerous external URIs suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=persepolis+pdf+part+1 PDF link annotation
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/5bb70ddd.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/andrew_foster_facts.pdfIn PDF document text
    • https://bikezurikol.weebly.com/uploads/1/3/4/6/134612173/9456047.pdfIn PDF document text
    • https://popewike.weebly.com/uploads/1/3/1/4/131407195/8153694.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/voyager_legend_cs_b335_system_bluetooth_lat.pdfIn PDF document text
    • https://babixugopanodip.weebly.com/uploads/1/3/5/3/135382952/30f6fa.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/vivoragowa.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/wujodibu/98376414098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5173d9d-c425-418b-bdd1-14389e49f8e4/learn_korean_with_bts_book_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/32110042055.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/bandwidth_limit_exceeded_mega_jer_solucion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fdb6aae-bfd7-428f-b89c-4c2ee14dcc60/1513444084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a6e51b-79f1-44af-a2fe-048078ea37fa/international_financial_management_8th_edition_by_cheol_eun_and_bruce_resnick.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509d9719-2a8a-4f35-92f5-0d5a56fc353d/60501754308.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/is_wgn_conservative.pdfIn PDF document text
    • http://ligujizulogi.atwebpages.com/acrolein_test.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/love_female_whatsapp_status_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/400c4300-f7d3-42b2-9e03-e47a9d0fcd6f/kuvulutinuli.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/6059982863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f124a4-9944-4fd6-acd1-f17b06b6b1e7/1347129077.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/galaxy_a10e_water_in_charging_port.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_off00014ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EF4 5088 bytes
SHA-256: 2a6cc8c6b0dc0561b1300236a3adf5e7ca445cd7c8b804c36bf73dd000a3c1cb
font_01_sfnt_off00016051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16051 10348 bytes
SHA-256: d0b9224ca0d6b9041fc859837c2d892dbce0bd773ab202ac8301acc04fd92a44

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