Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78b1c3d64aaae42…

MALICIOUS

PDF

34.5 KB Created: 2020-10-10 19:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: b175d01c976685d6787651c99b90ba00 SHA-1: f52e7563ca4957dcb3f46ac5e4da190f0dd02f75 SHA-256: d78b1c3d64aaae42499188b2af02a41fe104fb82cc5eeb3d20d1ac877396df09
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://cctraff.ru/strik?keyword=triangular+del+esternon In PDF document text
    • http://files.centrealimentaireaylmer.org/uploads/1/3/1/0/131070301/nijutubog.pdfIn PDF document text
    • http://files.adamsternconductor.com/uploads/1/3/1/3/131384301/viluli.pdfIn PDF document text
    • http://files.sarahpeoples.com/uploads/1/3/2/8/132815785/597ece64b5a00.pdfIn PDF document text
    • http://files.sogo.cc/uploads/1/3/2/6/132695915/a4ff542.pdfIn PDF document text
    • http://debaju.joyfulalwaysdesigns.com/uploads/1/3/2/7/132740541/8361093.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bac7a24-d9bd-4210-a1c6-5944f8352329/xewulemikegolekifopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53160fea-7424-4e04-8e08-86369810bf53/jujifuvufuvaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c06130bb-f3f7-4e80-9acb-bbf0eb6de99d/88317460577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f5f456-44b0-49ea-8012-9a5cedff9463/30255744117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bcdf3c3-e702-43dc-9747-5b5aeafe1798/17398248438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c7a081e-7611-4298-824d-0c6bebb5351d/65221266833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f33050-b784-44a6-a7c5-0b3434f8b8c3/49538285614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3604b6-ae7d-47f4-bb7a-8700996daf8d/lodulawabipuxesozif.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AD2 4944 bytes
SHA-256: fd4dfdf1eed6ce18bc5ae1e9261adec608af24f10a287e5ce2d6d8af36822ba1
font_01_sfnt_off00005ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA4 9952 bytes
SHA-256: 9e4f6b03fbb2be023ad9021402054812354d31cb1d358b15af6dcfe05ba5e204

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