Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db781da996dbf3d…

MALICIOUS

PDF

72.2 KB Created: 2021-02-26 20:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f518e9b5281a89e8a1605bfa8ef66989 SHA-1: b5eef5fa10eed3b3af611b74fe69e0319f609258 SHA-256: 1db781da996dbf3d71cc05cee775fd17f2dcd9b245becf9a86567b97a6710f01
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/wix?keyword=schrafft%2527s+ice+cream PDF link annotation
    • https://cdn.sqhk.co/gopilufifeda/chch5FY/bolosapim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473654/normal_6023e0a1277ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478387/normal_602005e591cc6.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/bwjjbic/snakes_and_ladders_template_printable.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382778/normal_5ffa2795ddab1.pdfIn PDF document text
    • https://bivitomelonex.weebly.com/uploads/1/3/4/4/134491730/zoguxetutakut.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/HggpjcY/vuvilikilaxujawajelawaze.pdfIn PDF document text
    • https://cdn.sqhk.co/pulijidapis/hb3Ybnd/postknight_stats_build_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447433/normal_6017245e07ca5.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/gapivegek/brisbane_free_to_air_tv_guide_today.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/axios_file_from_api.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/cerere_concediu_fara_plata_formare_profesionala.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_off0000ded4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED4 5228 bytes
SHA-256: f04e70402f6228d33114f70a6b6afbc4f5e1bdd67c3991d8e9fbe653671624e0
font_01_sfnt_off0000f07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07B 10592 bytes
SHA-256: 9ed1527e9b89adb8dba2d0e87a4257c89e15ab5c09f09740d20020c4725ea4b2