Malicious PDF — malware analysis report

Static analysis result for SHA-256 906743c6d93beb5a…

MALICIOUS

PDF

42.4 KB Created: 2020-11-05 17:00:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: faf8d17662e8e14cf0d289ceb27837bf SHA-1: 953a63cd384d817b2997c381bde1fa79ab6034b6 SHA-256: 906743c6d93beb5ac4356e0a10e368cd8aaa482055bc2f9193a25c77f53b5f12
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/aws?keyword=ap+macroeconomics+2017+frq+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378425/normal_5f8ec1f565a3b.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/nositagexijamig-rutesabonutafex-konebupeven-jowutunotikuwu.pdfIn PDF document text
    • https://jaxebenub.weebly.com/uploads/1/3/4/2/134266064/311799.pdfIn PDF document text
    • https://gavawujag.weebly.com/uploads/1/3/4/3/134370084/vejok.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/2778090.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/6c3897bb4ec1a.pdfIn PDF document text
    • https://vunolevakedo.weebly.com/uploads/1/3/4/3/134317922/9137a9b3.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/fedufiporara/madden_mobile_generator_no_human_verification.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/libaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f96579-ccda-47fb-968e-27f30e5192dc/22305564620.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/iowa_american_legion_baseball.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/neboniditejimeginoxowetu.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/demukavukodowininow.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_off00006577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6577 5740 bytes
SHA-256: 81f1569ecff5b05ecc51d56736e2a18ba210cbad347e243e2f6181021917511e
font_01_sfnt_off00007911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7911 10420 bytes
SHA-256: b5e891ca1d9dd9b6537f4aed03c1c2a8016d69f33a771e2c0d69e5377ab0b02f

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