Malicious PDF — malware analysis report

Static analysis result for SHA-256 5abe2bf11458d7ef…

MALICIOUS

PDF

42.6 KB Created: 2020-10-31 21:09:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: ad4b4fae6d78d6ea3ed75597929ed6b5 SHA-1: 093752ce8607e6e6f7a74d3b86538eb362ef2dfe SHA-256: 5abe2bf11458d7ef9ab5b0de79681f146367abbfac32b24375b9964a81e8dc6d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://ttraff.me/123?keyword=the+forbidden+clive+barker+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410679/normal_5f941973d0ecd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_5f8fdc3dc3f71.pdfIn PDF document text
    • https://xasuvakem.weebly.com/uploads/1/3/4/4/134400919/mobuvipinomeneda.pdfIn PDF document text
    • https://kafaziwe.weebly.com/uploads/1/3/1/0/131070109/vedom_rijuxav_wopenesagik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377112/normal_5f917eac1e7a9.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/bazenumi.pdfIn PDF document text
    • https://famotufenimuz.weebly.com/uploads/1/3/4/1/134132127/1047522.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/9c1dc000-95d8-433a-9e97-9d54812153f0/nivuratovoxijaxel.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/zatopepi.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/acetaminophen_usp.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/49591980219.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/bsc_nursing_college_in_west_bengal.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_off000068b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B1 5276 bytes
SHA-256: 0189c62faad85c0e5e91e9f1b1ac75d7e2b720dd12464c002d0dc165d9965a16
font_01_sfnt_off00007a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9E 10424 bytes
SHA-256: 4646ed17bcf75fdabc6e3fab584e747a9a8c6bb0ade5c5101367ab64405dd6e5