Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1429e412291c04b…

MALICIOUS

PDF

73.2 KB Created: 2021-03-04 23:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b2154fd22e4578f5662671024c564bba SHA-1: 9cb1d0daa872d130a0877c1971fab383495292bf SHA-256: d1429e412291c04bf104063f1f6b5a7bd33d83ec180b5750878d8e476911d206
134 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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mezovuduw.ru/wix?keyword=to+kill+a+mockingbird+ch+24+questions PDF link annotation
    • http://parkji5x.xyz/nixon_the_player_blackfcx0l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493198/normal_6035db72a6968.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491437/normal_5fcb09376a240.pdfIn PDF document text
    • http://profer-opt.ru/51500696288dkmv.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/hfZYvjj/enerpac_air_over_oil_pump.pdfIn PDF document text
    • https://cdn.sqhk.co/niramojiga/hcYlgeL/roblox_gift_card_generator_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nivopekodi/YPsifii/jubiwabufemo.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/ragasujegepu.pdfIn PDF document text
    • http://jekenufakewe.mypressonline.com/92005212797.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/vovuzize/rexexid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e09828b-dcd6-4634-8fae-58b1a62bebea/george_foreman_rotisserie_basket.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/chestnut_netherland_dwarf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6479d744-fd1c-4d14-87fb-3e67d03f905b/46028353545.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a6345e-88c5-460e-8433-89ee9fec92da/66251488301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7337977-b2d9-4d64-8c03-f0c0983b0373/pelpro_pp130_pellet_stove_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03180d67-cf41-4f30-953a-da73b77f3dbf/setefatefixopokeduxezirot.pdfIn PDF document text
    • http://wujagenak.atwebpages.com/how_long_is_machinist_mate_a_school.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/job_application_letter_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/fuzokaxojedonuvuxodagitu.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 6

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_off0000e06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06D 5852 bytes
SHA-256: c6f3cf36402511896d67ee38cc423f1f0565cae80b32d5dc306c0603f9d12125
font_01_sfnt_off0000f421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF421 10284 bytes
SHA-256: 0386892a1f96e55cd1e76078df8e292dd355d357f7dd65682f3a19d5dd233a82

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