Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ec50af3f8501d9…

MALICIOUS

PDF

71.3 KB Created: 2021-02-20 03:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4213b1d79cb68c99bd9152ee6b0c3f02 SHA-1: 694d53a440ee1daf7d06139470392bb51f683da0 SHA-256: 39ec50af3f8501d91101aea6151e14c00e24a1595695e0c07ee72746328982c9
186 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.
  • 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://bologen.ru/wix?keyword=avent+isis+manual+breast+pump+parts PDF link annotation
    • https://zifudaxoxatoj.weebly.com/uploads/1/3/5/3/135313713/e4a6efd77b59.pdfIn PDF document text
    • https://mixabukosi.weebly.com/uploads/1/3/4/4/134479433/b2a8dd266.pdfIn PDF document text
    • https://zukusabaxiwig.weebly.com/uploads/1/3/4/0/134000387/zuxivir.pdfIn PDF document text
    • https://fogipomovilop.weebly.com/uploads/1/3/4/0/134018275/5461983.pdfIn PDF document text
    • https://dofemavuxowag.weebly.com/uploads/1/3/0/7/130739836/rafud.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/iaZ5Mwi/warwick_paradise_island_bahamas_airport.pdfIn PDF document text
    • https://doxemikawapuki.weebly.com/uploads/1/3/4/3/134314999/7739530.pdfIn PDF document text
    • https://nabebumiz.weebly.com/uploads/1/3/1/4/131452902/38be1d9b.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/QidHegf/gangs_of_london_season_2.pdfIn PDF document text
    • https://cdn.sqhk.co/jekidase/RY6e9ij/combo_critters_1._3._5_mods.pdfIn PDF document text
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/polizanugifo-vixavidevarugo-nowemivosefak-jedesu.pdfIn PDF document text
    • https://joripulugafu.weebly.com/uploads/1/3/4/3/134318872/pixirel.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/VZjjage/67457553183.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/vuforewebub/hlmix_fund_fact_sheet.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_off0000db97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB97 5156 bytes
SHA-256: 88c500ee5ebed761d849934a4fc9cc18e8c9391600cbfbd1f7f06aef6f9fa359
font_01_sfnt_off0000ed05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED05 10324 bytes
SHA-256: 43644cdb91c7e8ea3fdf7ff5492c343bcd41d6f38085539b6ddcf04a5f45b12b