Malicious PDF — malware analysis report

Static analysis result for SHA-256 36311c49bb2539ce…

MALICIOUS

PDF

42.1 KB Created: 2020-11-06 18:37:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a1be96a5b159ceb92b7ac9d36bd33464 SHA-1: b200c759257d6cbe3e3a9deb645ecd52cf456a91 SHA-256: 36311c49bb2539ce4792f2ae387d08ceb749933d48362ebf98ad47cbd8fd0d54
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://traffset.ru/aws?keyword=maytag+user+manual PDF link annotation
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/7767590.pdfIn PDF document text
    • https://rumeravovavupol.weebly.com/uploads/1/3/4/6/134619367/wazokugomelusezeg.pdfIn PDF document text
    • https://puvebimu.weebly.com/uploads/1/3/4/3/134311544/b60698b1fcc.pdfIn PDF document text
    • https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/fijis.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/40728c23-ae8a-4bde-aefc-ca2204ef06cb/buwuxixadewazonuzukak.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/53070953548.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415f80bf-8385-4e86-85c7-e2d8facd4210/xereletifotobibezoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce9d6aa2-59f5-439e-b89f-be99ff868bda/space_cowboys_band.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff0905d-f686-4ac1-9db8-252447338c87/dafatijamalopirimomiwezok.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/speedex_tractors_14.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_off0000672d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672D 5112 bytes
SHA-256: 5263455e0fa55bb3516cd3e313af1fa9098fa90a8a814ca3367c6cc9835dabe9
font_01_sfnt_off00007892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7892 10392 bytes
SHA-256: 4c70d13a25b5fa284712889ac6c3ed1ccc2e0d1854af1c608a6f1493f1498dbc