Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e08a3037206c823…

MALICIOUS

PDF

74.0 KB Created: 2021-06-10 20:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8be4b88f2f93cd26dd2ee0d5e9e6036b SHA-1: b967fa52fad2e623ca76f5bc24898d55054e3e27 SHA-256: 9e08a3037206c8234c51143f28d79c952cf5b3bd5470438e7814686fc59304fc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to a streaming service lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting a malicious intent to distribute content or phish users. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its deceptive content and link farm structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://catamma.ru/pbw?utm_term=watch+john+wick+3+streaming
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/turutorar-lejadarobovubon-sadek.pdf
    • https://girusidopot.weebly.com/uploads/1/3/0/7/130738876/sufutodut.pdf
    • https://dufelawukada.weebly.com/uploads/1/3/2/6/132682042/1808690.pdf
    • https://vobikonim.weebly.com/uploads/1/3/5/3/135390296/venefugiz-zekumadezubevu-sawugesepegi.pdf
    • https://lutenidu.weebly.com/uploads/1/3/4/3/134398581/tegivituf_nopozodax.pdf
    • https://laguwiba.weebly.com/uploads/1/3/4/7/134719839/mulejaj_benirus.pdf
    • https://keveronusixenub.weebly.com/uploads/1/3/4/8/134852782/6995029.pdf
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/0ad79dc4218f3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ba794226-8d3c-465f-b494-fbf790f4bb71/joxosizabomisovodotonu.pdf
    • https://uploads.strikinglycdn.com/files/b77b20f9-881e-402c-b7c4-8d99b97e26d2/ejemplo_manual_de_funciones_y_responsabilidades_de_una_empresa.pdf
    • http://mefijunov.pbworks.com/f/infix_to_postfix_conversion_using_stack_and_queue_in_java.pdf
    • https://uploads.strikinglycdn.com/files/54c35721-f154-41ce-a530-ece44bcab7e8/33524305403.pdf
    • https://uploads.strikinglycdn.com/files/c1f444f5-9a27-4bc0-90fe-b0816eb46089/how_to_draw_anime_girl_and_boy_step_by_step.pdf
    • https://uploads.strikinglycdn.com/files/e066bb17-3670-4c45-85de-d7ad2d49e0a3/12552173755.pdf
    • http://wurogakitibe.pbworks.com/w/file/fetch/144747309/sezopotusazutebegaw.pdf
    • http://javefanudosa.pbworks.com/f/vutomupeberaxupozozuj.pdf
    • https://uploads.strikinglycdn.com/files/2daef3f4-9155-42e0-b269-ba20cf86346f/is_cissp_worth_it_2019.pdf
    • http://pewudomame.pbworks.com/f/speakout_pre_intermediate_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/5e2810c8-685b-481b-a443-35536bae1649/what_was_the_second_great_awakening_brainly.pdf
    • https://uploads.strikinglycdn.com/files/33060aa6-f843-4bb7-9e5c-a5566dcc983b/panasonic_inverter_microwave_spare_parts.pdf
    • https://uploads.strikinglycdn.com/files/e259d01f-55dc-4989-9ee1-128daa35c5e6/vaguzoburifamavezire.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_off0000e2a7.bin
e123a0fbd4a3e27b81831c98f7359bb32dc4746026d37baf11de8bb365115917		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A7 5588 bytes
font_01_sfnt_off0000f59e.bin
da5d75f0343ef4d330413dc95e1498334784493ae1785e20ad2f7f87294c935f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 10908 bytes

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