Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9bcd7bdb8b0974…

MALICIOUS

PDF

77.4 KB Created: 2021-03-11 06:20:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7d884188f6e5da6d628c726283fb982a SHA-1: cf5b87791d2a1b5160df97a2236e3ae228bbc392 SHA-256: af9bcd7bdb8b0974a7911f42d97d8625d7b76f4f1d158b9ef856873465f874a6
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jumiwimov.ru/123?utm_term=chotta+chotta+video+song+free PDF link annotation
    • http://raxawevamavox.getenjoyment.net/ripixutosid.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/the_hunger_games_2014_full_movie_download_in_hindi_filmyzilla.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/rabenabuboga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_45efcd46b6434d86841fb7c255afc918.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/donake/app_store_mac_os_x.pdfIn PDF document text
    • http://pazepoxi.atwebpages.com/suzufijejabezoto.pdfIn PDF document text
    • http://dukazel.rf.gd/cherubim_and_seraphim_praise_song.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/navulukugevajejipejod.pdfIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_5009ad6a5b564dfa9f00aa4fe5b138ea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gomaxod/giwawejigon.pdfIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_419b59b4c9714041940a5f85a614c77f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rejiner/5811694295.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/76102308575.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/fadigidesuwisikag.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/bepezowetaselure.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/muxesuzaromewiviwofup.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_32869cf52f5a460ba44d83c7735eb232.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/57559917285.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/totugilolapevovido.pdfIn PDF document text
    • http://vavijirodujozi.rf.gd/brca_gene_testing_nice_guidelines.pdfIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_0c22a177ec814f3ea2800e1ae8de91d7.pdf?index=trueIn PDF document text
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_b264670c691149b9bd0b35877f58092e.pdf?index=trueIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_40b66ac99b1f4e4587d9fe737576bd22.pdf?index=trueIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_483e106cd36e4a649e17478bfd4106d8.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16B 5216 bytes
SHA-256: f8eabf710a2dd7d33f62608d4b21268f5a3de142cf1a8a7d23506b70905251c1
font_01_sfnt_off00010327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10327 10868 bytes
SHA-256: f656f99ac587e0c74b46a31c032cf473e19a0a50c01f34d8dd633d6821edfc69

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