Malicious PDF — malware analysis report

Static analysis result for SHA-256 3077982a8061770c…

MALICIOUS

PDF

79.9 KB Created: 2021-04-01 15:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6bfe128199523d927848778ac306870e SHA-1: ea89517e078cfa769773d2c0f87c495214e08159 SHA-256: 3077982a8061770cb15af0a1738e4fbe2255d68316cc380bb831f1864cb64e20
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=tratamiento+alveolitis+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482190/normal_6032952864471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426815/normal_600fcceee5e4c.pdfIn PDF document text
    • http://detonic-deutschland.website/why_is_my_bissell_proheat_pet_not_spraying_water939xw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462345/normal_601bf032d8f3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_6027ad0c96d46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366632/normal_5ffc19b4ae73c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475729/normal_6057a3daaee2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481156/normal_602aa632ad3cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422638/normal_5fd0683e45626.pdfIn PDF document text
    • http://rkconstructionsucks.com/45402901401fvvxi.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/sefepugolupalax/how_to_write_a_good_advertisement_book.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/fear_and_loathing_in_las_vegas_book_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/boolean_value_in_json_format.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/fevoke.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/android_carousel_viewpager_github.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/86003744937.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/fikemuxikepe.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/73051809986.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/luvetesasosodimokided.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/wuxuzoletamasoziv.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/pic_assembly_language_tutorial.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_off0000f7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A8 5196 bytes
SHA-256: 2d2622b768133f361132745dfddd894949cb052b0ee4e369c6697758ecc2ac24
font_01_sfnt_off00010942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10942 12776 bytes
SHA-256: bf20765f70e8f76341291fe14a78fc84f31e6cad72b533b46657cf80128e38f5

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