Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d8282ec952f7d4…

MALICIOUS

PDF

50.6 KB Created: 2020-11-06 16:34:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b82fdfdcb384af036c81ffaad7572b43 SHA-1: 2ea3ad2ecd58eab9235d872f17eb604b5e188025 SHA-256: 15d8282ec952f7d4e2a5e4e45b147dde88912b888f340d6a66dd08e72006fe3c
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=keep+that+same+energy+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f96532971650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_5f984e92d49d5.pdfIn PDF document text
    • https://limisakaxenit.weebly.com/uploads/1/3/4/3/134371081/fd1ac9e1e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f916f53be1e5.pdfIn PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/falukajonuxe_rojotavakop_fesufakot_xasefupenagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379219/normal_5f8e95ee6ee54.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wefadep/best_english_grammar_notes_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/lanowilovuviwib/96753126116.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/kemasije.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/insubordination_write_up_templates_free.pdfIn PDF document text
    • https://xasavibe.files.wordpress.com/2020/11/95400690690.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/bisatugabukaloxiwawutepox.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/vudulozusedudatem.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/89520339554.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/roblox_admin_script.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B3 4948 bytes
SHA-256: 95300811f20e98836e5866f12be09bd72019ac7739f8c52817b91fe0fcc04673
font_01_sfnt_off00008a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A61 10860 bytes
SHA-256: 5cfda49c156990a44527c69ee59f668867ba2c4cdc15dbd85dd9cb7eef28ea9e
font_02_sfnt_off0000af38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF38 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361