Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfcc7cb37db0b52c…

MALICIOUS

PDF

72.6 KB Created: 2021-03-02 14:20:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 712ceab8297cfe45ce5da891507d5aa2 SHA-1: f73921118decc1291e3a839104c1cacac49d1068 SHA-256: bfcc7cb37db0b52c798f0fe03cd4731f4a14ec5f6e1d83ab2381b55f4cf6c682
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://dafemum.ru/wix?keyword=real+cheats+for+clash+of+clans In PDF document text
    • https://sabalijazot.weebly.com/uploads/1/3/2/6/132695986/8b0fffcddb9691.pdfIn PDF document text
    • https://zemaxixose.weebly.com/uploads/1/3/4/6/134636511/xopoxizibeni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502833/normal_60350736c40d5.pdfIn PDF document text
    • https://sajofagexureleb.weebly.com/uploads/1/3/4/6/134652103/32490838fb.pdfIn PDF document text
    • http://car-den.ru/vajegoluxarelakunoxeiw0ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_5fd84301c4744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393033/normal_602fa822b33da.pdfIn PDF document text
    • http://zuvels.xyz/how_to_find_how_many_atoms_of_an_element_are_in_a_compoundrpct8.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/juwofuxufijup/64646211518.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/gaziwadopososarori.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/bewetirotirurulime.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/xojobefimowusumiwunuma.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/bumidewizovegukufu.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/geometry_segment_and_angle_addition_postulate_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/98898291080.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/chrome_64_bit_offline_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/pumpkin_coloring_template.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14D 4976 bytes
SHA-256: cf8da9616beaa6b1e76d6ea1c2859fd4d76ddc514923b5476d8a906f23280440
font_01_sfnt_off0000f235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF235 10388 bytes
SHA-256: 74762ed3d63700ea440f6d64b6b2bbc58b841bbf64780fa386e2518521bd4f1b

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