Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb9afe668a94dc3…

MALICIOUS

PDF

86.1 KB Created: 2021-02-25 13:53:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a3e9ab02c92258f2b865d9b467ff92aa SHA-1: 1b25be494b8deaee2d5da1907e58bf73705d6d9e SHA-256: 2eb9afe668a94dc3e8c24e762eb446d63fd7370cdd40a90d493ba304a6210e48
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs suggests an attempt to redirect the user to a malicious site, potentially for credential harvesting or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=digitech+fs3x+footswitch+review PDF link annotation
    • http://jiwapadenejeza.getenjoyment.net/2698218121.pdfIn PDF document text
    • https://sapesikunudob.weebly.com/uploads/1/3/1/3/131398489/952a378a.pdfIn PDF document text
    • https://cdn.sqhk.co/vejuwozigef/heOd5he/shooter_movie_watch_punjabi.pdfIn PDF document text
    • https://javemutamutog.weebly.com/uploads/1/3/4/6/134638327/168190.pdfIn PDF document text
    • http://leqqurint.online/dasevusujubovikilojodxkgdf.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/puroferogubix.pdfIn PDF document text
    • http://homiak.fun/monster_hunter_world_layered_armor_guide2e6ve.pdfIn PDF document text
    • http://triple-doska6.club/fegidofomi8uo1r.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/81137696491.pdfIn PDF document text
    • https://cdn.sqhk.co/rodofusavivi/jiiifgc/mindsprings_health_facebook.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/spider_man_3_mobile_game_free7licd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wejelinemadagep.rf.gd/rizadorumuxowuvoxod.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/34135185689.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/64939726334.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/what_is_page_break_preview.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A6 4964 bytes
SHA-256: 558798489fa9d15efe42593b633a0420f98a29357c8cfac26ed265199c3a50e9
font_01_sfnt_off000117c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C8 11032 bytes
SHA-256: b3a306acfc4021254219209532252018520b4e731559e017fdf9e180b9ff442d
font_02_sfnt_off00013d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D7D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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