Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac27a61e26df53a…

MALICIOUS

PDF

38.5 KB Created: 2020-09-12 21:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 375fbbc4707b49902c8d11a09b0d15fa SHA-1: 16df1188ef14477881fa25c6dc45a313ba975e39 SHA-256: 7ac27a61e26df53a3f730fa686f8b12d58c6867720235b09b27da119bed959aa
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.com/wix?keyword=unblocked+games+boxhead+zombies+hacked In PDF document text
    • http://fomumovo.colorbrushcanvas.com/uploads/1/3/2/6/132682076/2484373.pdfIn PDF document text
    • http://pobakav.westphysiotherapy.com/uploads/1/3/1/4/131438379/cfb54532.pdfIn PDF document text
    • http://nezafimoz.fiordamalfi.com/uploads/1/3/0/7/130739101/jololifubixig.pdfIn PDF document text
    • http://files.hansonfoodpantry.org/uploads/1/3/2/6/132681823/1b63725.pdfIn PDF document text
    • http://files.ckrobotics.com/uploads/1/3/1/4/131453843/3123105.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/a07927_f1ad25b3b09745cd9eb3e6e6e7b2d152.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3615fb_272019b769e24a8fb53320743a7a85de.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7041e4_e82aca0d6d2c4e06ad687bc5ae7a0ed4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e73fea_410b95b077b24963950012020519d3b8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/97368a_87f4111a837d475a8c4e9a42618fc6b6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/tonight_west_side_story_noten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7641/9744/files/boerse_stuttgart_case_study_answers.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_off0000567f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x567F 5572 bytes
SHA-256: 9f8f40991457f51799eed4f9414d7897432c0e7c66f84e4d85b1b0234830bd83
font_01_sfnt_off00006960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6960 10572 bytes
SHA-256: 6c7fa5f14247e88584fcef9100276782e8388deae074d731df6a7dac381a0e3d