Malicious PDF — malware analysis report

Static analysis result for SHA-256 749a2fbd767a1586…

MALICIOUS

PDF

39.9 KB Created: 2020-11-03 06:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 83d0fd228290458eb46e214316884e7b SHA-1: f1e427b26daf25dc0e04104cde6ee999c8096927 SHA-256: 749a2fbd767a1586e84824832e0727a1de5bcf0f2305337290b309f7a9d557d9
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to potentially malicious or unknown domains, indicating a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector, suggesting an attempt to lure users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.
  • 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://cctraff.ru/wb?keyword=piyesa%20sa%20balagtasan%202018 In PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/posazagas.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/42532088f4.pdfIn PDF document text
    • https://bogezozoxo.weebly.com/uploads/1/3/4/4/134479702/7661a34e266a50.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/83c047ba-ec8c-4c15-802c-0bc67fa613a8/64066109045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c44ac6-322f-41b1-a20b-4e8eddd234f1/66930281730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3362e0-bd47-4fa6-ae5b-4c5dca2e7b43/4169747530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8670734f-8f2f-4a01-ac75-5be82f74bdb3/98990499475.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c663b22d-933f-40d3-9d9a-4dbd077dae3f/wiluxixigigebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/230f3c42-42f0-4891-921d-9ed5c6999e2b/yugioh_gx_spirit_caller_action_replay_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c976997-871e-48b0-be4e-6e6404374e58/gulejuluze.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_off00005c30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C30 5520 bytes
SHA-256: 9a9eee9404cc343f7f003a8b564e9206922f1527283d54d824e828b34c5c4f18
font_01_sfnt_off00006f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F16 10984 bytes
SHA-256: 853120eee4e06193eace6161c60b69b14f38ffe21843d194a3036105499f45f5

Open this report in the interactive analyzer, or submit your own file for analysis.