Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfcad0b4b98c920e…

MALICIOUS

PDF

76.1 KB Created: 2021-03-18 02:16:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 21fb59967df1db41e448c7b93456582c SHA-1: 2b95f4a3ec241d2b9f28236278c7ffc4f3fe9eb1 SHA-256: bfcad0b4b98c920edf0dab8e68d90656e0a44f512ca882e0b31aa6b8aecaf3fc
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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://soxebez.ru/strik?utm_term=road+less+traveled+scott+peck+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454668/normal_5fd85f9788e46.pdfIn PDF document text
    • http://pakawuwujawo.getenjoyment.net/47215552094.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/infinix_note_7_phone_price_in_kenya.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_6042e6297933e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387571/normal_604b52444c3ac.pdfIn PDF document text
    • https://cdn.sqhk.co/fajixojemom/Nghjc3H/mirror_lake_utah_boat_rental.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_60519ade3c41e.pdfIn PDF document text
    • https://debovibeki.weebly.com/uploads/1/3/4/7/134715081/soxobapix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480173/normal_5fdba64628919.pdfIn PDF document text
    • https://cdn.sqhk.co/zotevokep/BOjfhhA/olympic_fanfare_and_theme_trumpet_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407997/normal_5fe5c65855a88.pdfIn PDF document text
    • https://rewusimivizegan.weebly.com/uploads/1/3/4/5/134578415/b5cdb100e7c94.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/7730439340.pdfIn PDF document text
    • https://cdn.sqhk.co/rebamomidaw/ZjagaZQ/train_simulator_uphill_drive_unlimited_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459654/normal_60527f1430098.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/pewibim/ordering_decimals_worksheets_6th_grade.pdfIn PDF document text
    • http://dezobod.onlinewebshop.net/81677511417.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/what_is_the_order_of_the_divergent_trilogy.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/casio_privia_px-150_power_supply.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/facebook_ads_2019.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_off0000e92f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92F 5324 bytes
SHA-256: 2f47d6993379c1942321608d938e2f0ccea53704f551ae9fbfb9593dc2c96f8b
font_01_sfnt_off0000fb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB67 11196 bytes
SHA-256: edd042c0e9bccc22c00b0a009c39592b95d3b65eedf30f5b257f2db0c7675849

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