Malicious PDF — malware analysis report

Static analysis result for SHA-256 4052e9b116871899…

MALICIOUS

PDF

70.2 KB Created: 2021-02-15 01:51:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 413741f528b8683451d9f1637b4a5585 SHA-1: 36b72f83818fe306bacef0f207d28953cacb676d SHA-256: 4052e9b11687189962121266bbc33a71ed657c87549465bb1083f45c59a283f7
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=behind+the+dune+find+the+traitor PDF link annotation
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/sugim.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/edfvjc1/coalition_multiplayer_fps_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/gfjfVMj/13818022650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381287/normal_6028e8d0cdf1e.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/YTOgep0/french_nails_and_spa_cranston_prices.pdfIn PDF document text
    • https://wokusozevopiwaj.weebly.com/uploads/1/3/4/3/134381386/takene.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419425/normal_5fed79043c176.pdfIn PDF document text
    • https://kewakovek.weebly.com/uploads/1/3/4/4/134467638/2986197.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/nuxomigo/tuwigisedirogumirobalufe.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/wokiwatun.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/source_sans_pro_adobe.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/sensomatic_load_cell_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/destiny_eater_of_worlds_guide.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_off0000d96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96F 4832 bytes
SHA-256: 602694be67946f9f033b898a57da87936e609e6359c06e09c9b35ba188c7f21c
font_01_sfnt_off0000e9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 9964 bytes
SHA-256: 029d5832b104bdf88e21ac95b1156bbe8d5e4897db8c407db24e7f27f1bfc3aa