Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e3b7b7dd772204…

MALICIOUS

PDF

77.1 KB Created: 2021-03-15 00:05:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d03b07c0b7786ed6ba208b0dace6c139 SHA-1: d763981345443c5d3aa4c83b026a44f1e7ceb29a SHA-256: 95e3b7b7dd772204667f22da8c7586cc87e3e004a181d98f78b0d9ef08e65e78
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as potentially malicious link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

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://pelibifir.ru/wix?keyword=sci+207+week+4+quiz+answers
    • http://santaparker.store/vakolerb9jr8.pdf
    • http://rinujajija.getenjoyment.net/79100314673.pdf
    • https://luxituwane.weebly.com/uploads/1/3/1/8/131859527/samuzawewosi.pdf
    • https://dunewalowipeli.weebly.com/uploads/1/3/1/8/131856746/fukuzibizusaxap.pdf
    • http://mizizufiku.mywebcommunity.org/trane_xb80_manual.pdf
    • https://dowamodugepaxa.weebly.com/uploads/1/3/0/7/130739159/4999448.pdf
    • http://pc-remont.website/how_to_check_title_deed_in_kenyas6t3z.pdf
    • http://timelessdecorum.com/437195879823rsaf.pdf
    • http://richmaya.site/domiwoforivuu2.pdf
    • https://guzovadolo.weebly.com/uploads/1/3/1/6/131606502/9535597.pdf
    • http://bukenisefino.mygamesonline.org/ancient_greece_worksheets_3rd_grade.pdf
    • http://nibakelenixezas.getenjoyment.net/sennheiser_ew_100_g4-me3_a-band.pdf
    • http://javefuxola.getenjoyment.net/31802398131.pdf
    • https://demutarovawo.weebly.com/uploads/1/3/3/9/133997894/5581461.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_ba7f2c77448d43d9a1a75eb0b3108541.pdf?index=true
    • http://saboveliga.myartsonline.com/16545014770.pdf
    • http://nogibusap.epizy.com/hp_officejet_pro_8600_ink_cartridge_cannot_move.pdf
    • http://fapizof.rf.gd/los_fundamentos_tecnicos_del_voleibol.pdf
    • http://dapizodipe.myartsonline.com/d_d_barbarian_5e.pdf
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_3a6c4aff5f2144f98da2b242441c99e5.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df9a.bin
9aeabab753df22c066ef1f15bc12c1f3f8e52b77881c11ab4b99eda25ecf1d36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9A 5328 bytes
font_01_sfnt_off0000f1dd.bin
50cc94cbfe21595756209dc8984b0c4addb2819299a067ca26e4ae1971e10c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DD 10932 bytes
font_02_sfnt_off00011719.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11719 4324 bytes

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