Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b902ec1cc00cd62…

MALICIOUS

PDF

77.1 KB Created: 2021-04-10 04:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6b4561b313640d3f415823902348c7d SHA-1: f1275bc2c8717dca37cb603454c4a9a11d75d68f SHA-256: 7b902ec1cc00cd629bc128badf1a58a3cbe75442013a68cb57e9ff43a0627250
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to external websites, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of disposable hosting for these links, further suggesting a malicious purpose.

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://seumenha.ru/strik?utm_term=how+to+start+my+troy+bilt+power+washer
    • https://nogekapufininut.weebly.com/uploads/1/3/3/9/133997605/lezamusotikarod-javomabe-suziso-liviramut.pdf
    • http://rolorutebu.sportsontheweb.net/55393351760.pdf
    • https://cdn.sqhk.co/vaminika/URXimjj/game_wheelie_challenge_ios.pdf
    • http://tidirakozodawon.getenjoyment.net/defensa_siciliana_variante_dragon.pdf
    • http://nidewopovuwubo.mypressonline.com/26954692880.pdf
    • http://sabovibin.medianewsonline.com/98488802881.pdf
    • http://laluwaraselolar.mywebcommunity.org/xodirawov.pdf
    • http://zaxiluxedexu.getenjoyment.net/7155792096.pdf
    • http://nijaxubazaziw.mypressonline.com/69225445717.pdf
    • https://bedaruwi.weebly.com/uploads/1/3/5/3/135326402/nipemoxi-nukiwovi-widata-wafonap.pdf
    • https://cdn.sqhk.co/wafavalufa/Oy2zhdF/yellow_cab_phone_number_near_me.pdf
    • http://wowovamofuzo.sportsontheweb.net/30494857664.pdf
    • http://kikifikoxije.mypressonline.com/48969261216.pdf
    • https://cdn.sqhk.co/kafosine/lhbQbjj/gukotilawilusowazure.pdf
    • https://cdn.sqhk.co/gidulikegel/CajbghE/petroleum_engineering_schools_california.pdf
    • http://kokulotasuz.mygamesonline.org/ab_blood_type_food_list.pdf
    • http://fosipuzo.mypressonline.com/97659328953.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mixanaz/63600771298.pdf
    • https://s3.amazonaws.com/napoledunadigo/jesosajibataloxukexaxomi.pdf
    • http://sebokegekesuded.atwebpages.com/43466410619.pdf
    • https://s3.amazonaws.com/wumodukubaru/hp_laserjet_p4015_fuser_maintenance_kit.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d6.bin
299c1a53c97c8e4efc529960357e8e29c5ee54b53a3ef4654cdefcb9e81d47e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D6 5356 bytes
font_01_sfnt_off000102ed.bin
24a607f42d6a901732e874db742d0870d763c6b19328dd498fa0f877fb9536ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102ED 10120 bytes

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