Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9654f5faf85f38…

MALICIOUS

PDF

41.2 KB Created: 2020-10-26 14:10:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 71a339e2697e74ff4e3f90f144583b9e SHA-1: e4d4a2902c517a4f91b4f7c173c2ac2f4c1d31b4 SHA-256: bf9654f5faf85f38609e8ceba645cbf00b9a5ab1679daaefd4006f828a3218b4
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=nba+jam+free+download+android+games+room In PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/mesorar.pdfIn PDF document text
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/29a0e2d07d848.pdfIn PDF document text
    • https://dosaremuxabibi.weebly.com/uploads/1/3/0/7/130739916/aea3e739d.pdfIn PDF document text
    • https://nexajatolotol.weebly.com/uploads/1/3/4/3/134308242/88fee35e3.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/1732614.pdfIn PDF document text
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/62b22ec4e.pdfIn PDF document text
    • https://zijavenokin.weebly.com/uploads/1/3/4/3/134315340/gesexobikaf.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/lodupafutaju.pdfIn PDF document text
    • https://fiwatinizajof.weebly.com/uploads/1/3/0/8/130874156/7397675.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/f18e11675cd7c47.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/mijanepenomiketuros.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000061e1.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000061e1.bin)
    • https://s3.amazonaws.com/fakuguvil/chaupai_sahib_steek.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/pefujuketekipiwaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/beechcraft_1900d_training_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/ielts_listening_actual_test_vol_3.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/zirapobulivaxavifaru.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/wigonajebadewexif.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/38487448190.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/zunagiwojavamapufafudiz.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/91125047666.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/borasuwuvusakezejutawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7d6940-f729-4841-8a83-1a9b4ec32e7b/xalot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/760bd216-4a3f-47d9-b2be-10620f7474db/warframe_akmagnus_prime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d79827b-cc94-4fd2-b6af-0b7473ba0440/zudowirurovesirake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c0cebd-f692-476f-9be5-2563bb130628/19742953216.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 extracted file (font_00_sfnt_off000061e1.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E1 5504 bytes
SHA-256: cf726412050185463862f1bb8c8cf33766068d6e375ef52c19c4e4f2c4c4a8af
font_01_sfnt_off0000749e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749E 10124 bytes
SHA-256: 343ce99157f75c50f0ecb5439e81e4a08ffdd26fdacc50cb4fe93e3cddc66715