Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe26e86071ea2ff…

MALICIOUS

PDF

89.3 KB Created: 2021-06-11 02:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c8bd30d2426161ad48c27a7bde99e0a3 SHA-1: a16f606aa700a24ca70ebbb31b6a615a4c8248f1 SHA-256: bfe26e86071ea2ff15b86ddd0de1987b13edc38e28c6e8c3c0094bb372d8096b
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 0.9995

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://seumenha.ru/123?utm_term=puffin+browser+pro+apk+old+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386095/normal_6022e84fe91a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446773/normal_6030d93bd59b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420761/normal_6009f3a586765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427811/normal_605db78d821c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_606820792c9d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479254/normal_5fe383e2c0c76.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4410714/normal_60b55bd9b5d1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412387/normal_605078f08cb70.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381738/normal_60053cf987d03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466411/normal_60c2877f67b4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kafunujazuwo.pbworks.com/w/file/fetch/144726402/zafaxokugivenipimuvenel.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/f/mobile_legends_kof_hack.pdfIn PDF document text
    • http://jotuwufo.pbworks.com/w/file/fetch/144876540/lagipiviwumuduludebabiv.pdfIn PDF document text
    • http://kugiwetod.pbworks.com/f/among_us_dev_skin_hack.pdfIn PDF document text
    • http://vidijowa.pbworks.com/f/lulizap.pdfIn PDF document text
    • http://zosajivapesi.pbworks.com/f/wesidu.pdfIn PDF document text
    • http://kosumepifise.pbworks.com/w/file/fetch/144876081/sadlier_vocabulary_workshop_level_b_unit_10_completing_the_sentence.pdfIn PDF document text
    • http://wenitat.pbworks.com/f/wiwugobisotapisaxisupisem.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC0 2908 bytes
SHA-256: 193ce0c36bfe545e6b70e1bdc4bdac6a469c2aa959ae8855eb9af1cd3909aeed
font_01_sfnt_off0000fa22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA22 5392 bytes
SHA-256: ca936bfeb1af11f51d3d9c799efce9399d74928e888f5906fe3fb2c308311164
font_02_sfnt_off00010c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C93 3804 bytes
SHA-256: 4713fba47f1e6b8ded61b5b3e377d13f5f8f7228185eb1d836d3a341d02e8ad7
font_03_sfnt_off00011baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAF 11252 bytes
SHA-256: c59ca38b0a4477729fb387edcd1f24ce461228f6765fb68e1c570ecaa3a69817
font_04_sfnt_off000141ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141EA 16132 bytes
SHA-256: 4f6d6443d667672870c38ce4e1d364e29e61a0df6fd2d8217a47270b9fff04c9

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