Malicious PDF — malware analysis report

Static analysis result for SHA-256 12180be35a5cc5aa…

MALICIOUS

PDF

41.3 KB Created: 2020-11-06 11:33:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: a1075fa9a2670930d9d62d817eef600b SHA-1: 515ec8fc43f85c2d4e50828edfa7fbe2a4097ca3 SHA-256: 12180be35a5cc5aa685132a0ebd03bdeb253647b19133e4e3dca53a947526ad6
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafficel.ru/aws?keyword=epic+training+manual+scheduling PDF link annotation
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/fuxufix-tesafe-dafujanemapixog.pdfIn PDF document text
    • https://zelidewa.weebly.com/uploads/1/3/4/3/134371532/8b85ae.pdfIn PDF document text
    • https://sakuvajavabese.weebly.com/uploads/1/3/1/3/131383602/54b768d7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_5f964dc7ead8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5fa49077a1c31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5f93fc97e1ee7.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/tumasun/31545091810.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/pasatizisapepo.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/sakirova.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/connective_tissue_matrix_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/raduxiwuzib.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/sportline_2787_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/hostels_jfk_airport.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_off00006356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6356 5444 bytes
SHA-256: a651455d185f5995b487557d88fcfb592f3c0ce420a14b30c3fa9f313d6527ad
font_01_sfnt_off000075ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75AC 10240 bytes
SHA-256: 18e8d5e339615b05c4fd55a37646929bcc545dfccdb4a77a7120b76afbcdff73