Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6977dc1c86b5d8e…

MALICIOUS

PDF

52.5 KB Created: 2020-11-08 20:20:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: f43ba56047cac08ebbb38a60be9c30e9 SHA-1: a72352b240f6b15f211fe148b6cb8125405a60f9 SHA-256: c6977dc1c86b5d8ece76e1ccd24dea9f82d5dca16786d83706a3e2fe611ccac6
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://trafficel.ru/123?keyword=subnautica+cyclops+guide PDF link annotation
    • https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/0cab35da0b1.pdfIn PDF document text
    • https://bokixewabukogu.weebly.com/uploads/1/3/4/3/134341992/xijefafobe.pdfIn PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/sugexi.pdfIn PDF document text
    • https://jirunemopisitex.weebly.com/uploads/1/3/4/3/134332051/nebat_setejaxumar_wofagewigutuwu.pdfIn PDF document text
    • https://fapovodulutob.weebly.com/uploads/1/3/4/3/134361236/visawanesufud-modesijinagil-buvawes-pajopok.pdfIn PDF document text
    • https://juwimifabofif.weebly.com/uploads/1/3/4/3/134369341/7817470.pdfIn PDF document text
    • https://relogeseji.weebly.com/uploads/1/3/0/7/130739887/sajavijizu.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/zunaporam/61946363724.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/98129357633.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/wivonu.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/37435902372.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/social_learning_approach_psychology.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/the_essential_cosmic_perspective_7th_edition.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_off00008e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E32 5488 bytes
SHA-256: 6095b2abf2ae5667aa90ba9bacd048ce7b65fd4ce6707865134b1ac4b06734f9
font_01_sfnt_off0000a0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F0 10608 bytes
SHA-256: 74320f1250f39337cc0cd434d96616a194a02e2c89f3d2c06a8626a98806c5a1