Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7962fad3039196…

MALICIOUS

PDF

76.8 KB Created: 2021-03-02 03:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 7446f0296e8d2454d3c433a3e0865e7c SHA-1: 8ca6fe1323afb76fc7188a2893f2ca828c0c1c48 SHA-256: ee7962fad30391964374fb10d85519e73d3803c725de237c3c8293bc16b7e555
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The presence of a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggests a phishing or SEO spamming attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users or distribute further payloads.

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/award?keyword=diccionario+b%25C3%25ADblico+conciso+holman+pdf PDF link annotation
    • http://wivaserana.mywebcommunity.org/how_do_i_reset_my_jbl_flip_5_speaker.pdfIn PDF document text
    • https://balawuwugo.weebly.com/uploads/1/3/4/6/134622143/xojefuzemef.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/14672.pdfIn PDF document text
    • https://sugasukeni.weebly.com/uploads/1/3/4/8/134878852/kirazem.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/how_do_you_reset_an_lg_refrigerator_air_filter.pdfIn PDF document text
    • https://rifodajawu.weebly.com/uploads/1/3/0/7/130739776/1616292.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/b75b796c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467036/normal_60373a7f80663.pdfIn PDF document text
    • https://torewofatovamek.weebly.com/uploads/1/3/4/1/134108613/nutekesozod.pdfIn PDF document text
    • https://ronafipilegov.weebly.com/uploads/1/3/2/6/132681204/82225.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/sulasatevirexo/87297621734.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/the_odd_couple_2015_dvd.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/verb_forms_v1_v2_v3_v4_v5.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/linear_equations_word_problems_khan_academy_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/nududagaletusolu.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/kirklees_building_control_application_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/conceptual_physics_textbook_chapter_2_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/design_process_for_automated_guided_vehicle.pdfIn PDF document text
    • http://firiwigisu.atwebpages.com/ariens_824_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/miputemareg.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_off0000de1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1A 5588 bytes
SHA-256: 8cf8743b5f84b3db4dd8f01b8647316a3f44777f00519581d55d6450625cd545
font_01_sfnt_off0000f0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F1 16764 bytes
SHA-256: c67362179eb58ec6b5890f8b2b1c2a64dd8206495cc4f0af714a064e3a872ab7

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