Malicious PDF — malware analysis report

Static analysis result for SHA-256 c86924ef637b27de…

MALICIOUS

PDF

43.1 KB Created: 2020-11-05 22:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3cb2245ab9b25e829518e2a58b269095 SHA-1: ea68d23402918128b9ad4f558c7518508724ef20 SHA-256: c86924ef637b27debffdf5307af8a45545d97a667639d752f5ce147402d2798d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation attempt. One of the primary URLs extracted is 'https://trafffi.ru/123?keyword=rhode+gear+bike+rack+suv', which is suspicious due to its generic keyword and unknown reputation. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://trafffi.ru/123?keyword=rhode+gear+bike+rack+suv PDF link annotation
    • https://nimitokusewifoj.weebly.com/uploads/1/3/4/6/134647116/xufugebopebif-banota.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/ccd87897318c8af.pdfIn PDF document text
    • https://wofexexugov.weebly.com/uploads/1/3/4/3/134318452/rasudamimuzuzus-nalolepa.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/felasorarabipis/25936715993.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/supply_chain_management_a_logistics_perspective_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/old_town_high_school_maine.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/song_of_swords.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/subwoofer_amplifier_circuit_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/spice_finch_bird_for_sale_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/blanking_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/pictures_of_poinsettias_in_church.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/cisco_ccna_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/soniromapoxakesoj.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_off00005f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F01 5136 bytes
SHA-256: 494ca72f18728298c169fec47a0eedb82bb9ccec8cf086bd37685c1f352d0466
font_01_sfnt_off00007093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7093 9692 bytes
SHA-256: 6805abb2cb5bc6bb0138e64444c97d418bd1fa3917be8eddd940b56fe620359d
font_02_sfnt_off00009193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9193 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.