Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b2ad0f4b67e37e…

MALICIOUS

PDF

82.4 KB Created: 2021-05-31 06:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6f039eab3da95ee49a22a715f3e6ce37 SHA-1: d2449e8fefbd3686b62e3b1cd7a2d480a1f2cb8b SHA-256: 39b2ad0f4b67e37ef737c8789dabc35bab4dd5840fd5d0693129c92e0498e600
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to various external URLs, many of which are hosted on disposable domains. The primary URL suggests a lure for potentially unwanted software, such as 'my talking tom 2 mod apk hack'. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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=my+talking+tom+2+mod+apk+hack+unlimited+money+and+stars PDF link annotation
    • https://nigomisenavuluw.weebly.com/uploads/1/3/6/0/136095850/2e747db8ec078b0.pdfIn PDF document text
    • https://wikuxokogex.weebly.com/uploads/1/3/1/8/131872144/jolem_kirigutali.pdfIn PDF document text
    • https://funujitumim.weebly.com/uploads/1/3/5/3/135347265/favefenizajupenub.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/9911726.pdfIn PDF document text
    • https://pedomolakikivo.weebly.com/uploads/1/3/4/4/134440841/nasibasexil.pdfIn PDF document text
    • https://fuvetozexogix.weebly.com/uploads/1/3/0/8/130874326/1c0ff9f5.pdfIn PDF document text
    • https://zonozedu.weebly.com/uploads/1/3/0/8/130874021/aff1d7aee88c.pdfIn PDF document text
    • https://waniritapi.weebly.com/uploads/1/3/0/7/130739375/1117778.pdfIn PDF document text
    • https://guvoruba.weebly.com/uploads/1/3/4/7/134742814/duzubedalasofut_marutozulokozex_tixazedolin.pdfIn PDF document text
    • https://gobajirosalafos.weebly.com/uploads/1/3/5/3/135392744/da88ac0833528.pdfIn PDF document text
    • https://fedubipogumuwu.weebly.com/uploads/1/3/1/3/131379546/mevoj_ponovukiwud_gelozonupez.pdfIn PDF document text
    • https://dapinolun.weebly.com/uploads/1/3/4/7/134762022/gosovamivuwa.pdfIn PDF document text
    • https://senuwisaf.weebly.com/uploads/1/3/4/0/134018119/63e4cd.pdfIn PDF document text
    • https://galesarenad.weebly.com/uploads/1/3/4/3/134380117/dibogepeg-nokatawo-fuxub.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
    • https://uploads.strikinglycdn.com/files/18523a82-8006-48eb-b8d8-47b885ae1f7e/wedevogezojumumokilisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c74e384-ed8f-430f-99c2-2e5a5c495c9c/commodore_64_emulator_linux_mint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93484537-6ca0-4497-ab22-d69b2ad7fd8f/cell_cycle_labeling_worksheet_answers_11-20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d96d2874-c614-48fe-a3a6-82ede8ebcabc/9384580383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bdadd79-6920-4fe9-a9f6-77130ea105e7/mezazesobiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74be5a93-1adc-44cf-b6fd-996f5b5a28e8/38239732863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d924d3fd-c09c-4f78-8157-56644da9223f/33102147439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa9f2b4-202f-48e6-af47-081aee03cab9/75922078065.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_off0000f544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF544 5672 bytes
SHA-256: 5ea10aa2abaabf930cc59441658f23d992a71a8fa0b70acaced0719641a816d4
font_01_sfnt_off00010873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10873 10876 bytes
SHA-256: 4e7b5ecab11272dc69cb957c6216f275e8916549b42d82205571c6fc81197b32
font_02_sfnt_off00012dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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