Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3b72d2e7099a9c2…

MALICIOUS

PDF

76.4 KB Created: 2021-01-06 07:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5d1b6e4aea7053bc4333f0df18eeade1 SHA-1: 4bf199631aba1a008b27a2c04e2a0ed767e6ed2d SHA-256: d3b72d2e7099a9c2b0854646e34d047ff091568d75d71649d5e9c0f4ff3ef59a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm likely used for SEO manipulation or to distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a malicious intent to redirect users to harmful sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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://gettraff.ru/123?utm_term=john+g+lake+his+life+his+sermons+pdf In PDF document text
    • https://jojusilinu.weebly.com/uploads/1/3/4/3/134343509/saxizofid-perir.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/juwoza.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/rinisagobilabafogi.pdfIn PDF document text
    • https://zopoxetofosifa.weebly.com/uploads/1/3/4/8/134863155/zapupejomu.pdfIn PDF document text
    • https://punadojum.weebly.com/uploads/1/3/2/6/132680976/9135267.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/a4a6dfda-fdb9-4df9-a57f-3fe709437bd3/jodix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce58abe-21a3-4df0-99da-155bc489f1ce/chicago_manual_of_style_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de2a757-af16-4b4d-8f20-7d7770bb9f3a/30346297051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ade742b-7bc6-4135-bfe7-b836f7b434f7/82236432893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/090b8f8f-09da-43fa-baff-4c81f79be386/benesetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73d795af-defd-43a5-883e-e2457efa665e/square_roots_and_cube_roots_worksheet_for_grade_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e922c051-4079-43eb-a53b-0461b90e15c4/photo_album_names_for_facebook.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_off0000ed5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5C 5508 bytes
SHA-256: 19c0b7befee8b950512fbf39cab0dca79995d96ca01e54a970a07f3c5c220f51
font_01_sfnt_off0000ffec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEC 10796 bytes
SHA-256: a75194f8710e4245c187b365307e91c985e61ca4c76073d79d53714fdb895166

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