Malicious PDF — malware analysis report

Static analysis result for SHA-256 b889ff7aac1c977a…

MALICIOUS

PDF

74.8 KB Created: 2020-12-30 09:39:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 304415a47d86c2517284a94bfd139c6c SHA-1: f276912a896c8d7aedf7056ff1b34f10c1b330f7 SHA-256: b889ff7aac1c977a951fb54254a2ffbc39cc95d43ef684420864b4ec2539801c
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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://traffking.ru/wb?keyword=bachelor%20of%20commerce%20accounting%20major In PDF document text
    • https://dojoxokixen.weebly.com/uploads/1/3/4/8/134878929/xewusipizemomobu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366655/normal_5fdfcd47706be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461485/normal_5fca7f6f16b37.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/icjdii4/secondary_school_teacher_application_letter_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/VM1Jpt3/wawape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482208/normal_5fbe6eadaefe9.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/jiwisigetizoxif/xobugejizulabawanotibudul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90ba2d0-8988-45f4-9046-0545cc1086fc/gozododunagaxiwijitonud.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/clocks_coldplay_piano_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b19df7-405d-47d6-b624-17e0712c7219/suroretigifovaxevefana.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/emotions_worksheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/artificial_insemination_in_cow.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/courage_the_cowardly_dog_horror_game.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/tugirenuloxuzafifov.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/dumimabore.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_off0000e6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A4 5240 bytes
SHA-256: 48b2639694589fa491938fc2516dfb5bf78bf5764ea2526aadae81db89b44b03
font_01_sfnt_off0000f857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF857 11168 bytes
SHA-256: 3f5d9f7dc330fabe67733302efbee9b8a974324fb6d5b48cfeb4b6430283075c

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