Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d3c607e5c9360a…

MALICIOUS

PDF

45.2 KB Created: 2020-10-30 15:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a3e51dcc061fe8ebfa3e85b8a1029ed0 SHA-1: da36517c215c8e71bb6a41f99fe10a2784658dd0 SHA-256: a7d3c607e5c9360a77ad5d7c126e57af53d1a6119ab170d6a1edb025c2cef1f7
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?keyword=graco+tranzitions+manual In PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/musub_noxevatug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5f998d4f39d7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5f8bd7fb97d6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382619/normal_5f93b1997c73a.pdfIn PDF document text
    • https://xowilululevala.weebly.com/uploads/1/3/4/0/134017879/pulofopusafux-vatejuzaxujugi.pdfIn PDF document text
    • https://garisufusomepis.weebly.com/uploads/1/3/0/7/130740000/97ecf908cfd68a.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000074ae.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000074ae.bin)
    • https://s3.amazonaws.com/magapeguwabe/lopumosinakamufav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d5918b-ed4e-4e15-9504-6b2d10cf09e7/sebovulutas.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/mufabolugexuwenotebajapa.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/acca_f5_question_bank.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 extracted file (font_00_sfnt_off000074ae.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AE 5024 bytes
SHA-256: a4614337f4926b8ad56aba6322ebef246db64bb099b82d758d7280e46f481b20
font_01_sfnt_off000085b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B4 10092 bytes
SHA-256: ba081d189939b03ac35058a60e26c596ab9b5153b930c90ff340e95e3ab33a32