Malicious PDF — malware analysis report

Static analysis result for SHA-256 55242805a9da4aaa…

MALICIOUS

PDF

75.5 KB Created: 2021-04-03 14:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9dbb76ef2c40c5cfc0559a46c04f298b SHA-1: b349391a84f9f8af3aecad50db5dc2be18ce58aa SHA-256: 55242805a9da4aaad675896946913db9d6557850be17d813709d236b2585f188
156 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 0.9996

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 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.
  • 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/wix?keyword=que+son+las+practica+social+del+lenguaje PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417659/normal_5ff24eec0cce1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_6045eb2163a3e.pdfIn PDF document text
    • http://kevufeduwatawos.mypressonline.com/dewawebatupakoneputegosos.pdfIn PDF document text
    • http://usecabinets.xyz/how_to_start_a_jonsered_chainsaw7s51r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418791/normal_6038d3cc9774a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501645/normal_5fe2dad97b99e.pdfIn PDF document text
    • http://poopo.ru/88493651071k3ynx.pdfIn PDF document text
    • http://zujewubowufonug.scienceontheweb.net/noralijefovojujirep.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/vepevozojugoxawake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_6045078bc9eed.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/xarojapi/konazugobesedajixud.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/32551102826.pdfIn PDF document text
    • https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_dbc943b96f6f4e7f9e9499605b6881f4.pdf?index=trueIn PDF document text
    • https://3dd85f33-233b-4b3c-8e53-142bc8307eec.filesusr.com/ugd/8df890_1ec9bf80f5e547df9977532975fe1f96.pdf?index=trueIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_1b490f8c67504a6f801c4707ee13f67f.pdf?index=trueIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_7cfd3b347afb4b1bb2d160433ea2bfde.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wefadep/tewemixegomemezu.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/film_basic_instinct_2_sub_indo.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/d_d_food_for_dogs.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/st_augustine_institute_formed.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/8066933409.pdfIn PDF document text
    • https://de2ee6d5-caaa-4265-b15c-40100ab77d99.filesusr.com/ugd/d43733_7990b1f6a2354a45a7cde7d3f2db199c.pdf?index=trueIn 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 4

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_off0000e835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 5376 bytes
SHA-256: 93ab1fff7b34bed3e7525ee338804574b959059f96326ca763148b22edb3a8d8
font_01_sfnt_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 11324 bytes
SHA-256: b56a3636ad41fe02f2c63d101b547a7f00fd8f9ad4edd8c60fd63dddc2f02b0a

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