Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cdd5af8afcffd33…

MALICIOUS

PDF

79.4 KB Created: 2021-02-04 14:16:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: cda638e0593218993d638ee9fae57f10 SHA-1: db2fa52c8e2f664e25a300c667e4200ccc3ef528 SHA-256: 6cdd5af8afcffd33a7d97be3c9b508554bde4d49473fed0d2e5a6adaf9e0a6a7
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wb?keyword=fantasy%20football%20picks%202018%20bleacher%20report PDF link annotation
    • https://cdn.sqhk.co/wixumenez/jdibnUN/fefituririwekaviwafaloni.pdfIn PDF document text
    • https://bojozavo.weebly.com/uploads/1/3/0/7/130740433/073bb84630.pdfIn PDF document text
    • https://kirimobo.weebly.com/uploads/1/3/1/0/131069812/6593595.pdfIn PDF document text
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/sidupajarivob-zomekefajitogu.pdfIn PDF document text
    • https://cdn.sqhk.co/kajurineg/saNjgjj/xeraweporuxowiseruxolel.pdfIn PDF document text
    • https://lutigasudubuwa.weebly.com/uploads/1/3/2/6/132695203/motutitif.pdfIn PDF document text
    • https://cdn.sqhk.co/potebuso/gddeifo/51747318064.pdfIn PDF document text
    • https://mafugefowodofo.weebly.com/uploads/1/3/1/3/131378796/8c538130858b.pdfIn PDF document text
    • http://vigufut.iblogger.org/scratch_1._4.pdfIn PDF document text
    • https://cdn.sqhk.co/munuzimevu/6zbEWK5/scream_go_hero_funny.pdfIn PDF document text
    • https://sofepusususe.weebly.com/uploads/1/3/1/6/131636682/mujubobuxafuka_zoweliz.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/poguvelefa/excel_calendar_template_2018_with_week_numbers.pdfIn PDF document text
    • http://sujimivotabis.rf.gd/10773532345.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/35998828235.pdfIn PDF document text
    • http://donarup.rf.gd/65857722544.pdfIn PDF document text
    • http://figijosi.epizy.com/novabo.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/bose_soundlink_mini_firmware.pdfIn PDF document text
    • http://tugojolowok.epizy.com/9641386256.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_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 5884 bytes
SHA-256: 02b890052b5839fea422620f14ad7bb51c8350fea52f73213e0874b488bf8b57
font_01_sfnt_off00010c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C98 10532 bytes
SHA-256: 0ec2cb61f68a5137b1d51956cfbcbde807930d627dac3837d3c54b8ea7b8dc82

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