Malicious PDF — malware analysis report

Static analysis result for SHA-256 632e1a4cf86d1089…

MALICIOUS

PDF

48.4 KB Created: 2020-11-05 22:34:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9c12219db84ae5af98acaf4070eb3732 SHA-1: 97445de6eec7a4efdc3637a83e5b424c67bf4b2c SHA-256: 632e1a4cf86d1089b6d5172f3931008d5a8c714be3415feee4221a9e237e8b22
96 Risk Score

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/aws?keyword=but+in+all+things+pray PDF link annotation
    • https://tozupetap.weebly.com/uploads/1/3/1/3/131383790/sufikup_kosifakivine.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/didimedijolav.pdfIn PDF document text
    • https://gefusuteluvis.weebly.com/uploads/1/3/4/5/134595196/7422989.pdfIn PDF document text
    • https://viwawisigox.weebly.com/uploads/1/3/4/3/134342504/sudipa.pdfIn PDF document text
    • https://rujasuxok.weebly.com/uploads/1/3/1/6/131606047/6b33e7e7d.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/votubukaxogilix/sijodalabutitob.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/lesofoliruzadefige.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/justice_league_a_better_world_part_1_full_episode.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/gcsd_classlink_launchpad.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/zero_hedge_california.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_off00008081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8081 5232 bytes
SHA-256: 8169537d84e0a552375848aee9a8faea0a2877a614d71301f2dc3480b122851a
font_01_sfnt_off0000924f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x924F 10184 bytes
SHA-256: 4edb33521416cef90c5d9e0b0965c868eb0359f14dc8ead2aeb6a92dddeeda14

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