Malicious PDF — malware analysis report

Static analysis result for SHA-256 17581e1755127358…

MALICIOUS

PDF

77.8 KB Created: 2021-03-14 06:04:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4fca4b2297418a81ae1d00276b2e2880 SHA-1: 5d0741c83520059a1ef1234f03c9986d482504d2 SHA-256: 17581e1755127358e61cfd561312fd10b38ee04771c919f40bbfe0ce0b217782
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://druttle.ru/123?utm_term=baofeng+bf-+888s+walkie+talkie+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475571/normal_601f8dfdd4dc2.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/cYje0gd/galaxy_attack_alien_shooter_premium_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456667/normal_604024b312499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450513/normal_5fe29014add3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446649/normal_5fe81cc96bf10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369775/normal_5fe3ee94c1b9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466368/normal_5fccadac312c5.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/ggwTzhd/credit_card_application.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8e7d628-163d-4045-9be9-850e4d31a54d/apachebox_maven_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d611b75-b147-4d74-9752-2ed125c8e0f0/42652956781.pdfIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_04f8074a49094ebab19182ae5599aa6d.pdf?index=trueIn PDF document text
    • http://xifenarubomes.rf.gd/3297728198.pdfIn PDF document text
    • http://befadiw.rf.gd/chapter_2_cisco_it_essentials_exam_answers.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_b953aa82bdb14ec8b5cd27f0b0b1d218.pdf?index=trueIn PDF document text
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_44306de7976a4eeabeb82ae33b0f8c80.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb5b5a61-b461-4e88-9361-a7bd9ef7f0fe/bushnell_neo_ghost_factory_reset.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_off0000efda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 5560 bytes
SHA-256: 39480a4d651128007edffa8ddb6645ff434fb8ca061d21d0ed7fb4f5f6338cb1
font_01_sfnt_off000102dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DC 11092 bytes
SHA-256: 4490419a0dca4a413dfffda83e10546969faeac58bb2eb660ff1c156b78f82f3

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