Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a3258f2d72f138…

MALICIOUS

PDF

76.3 KB Created: 2021-03-09 14:38:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c3ab46ffc31f9eedd18ef092cea12dec SHA-1: 196796c546846fa87bd8ac99aa3a1d2ff2979a32 SHA-256: 00a3258f2d72f138d9a7f0e9244b69e47eca7aae66d66ebdd40701c0b7f49b79
186 Risk Score

Malware Insights

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

This PDF document contains a significant number of external links, indicating it functions as a link farm. The presence of multiple unknown URLs, some hosted on disposable domains, suggests a phishing or SEO manipulation scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/wix?keyword=if+you+kiss+someone+with+mrsa PDF link annotation
    • http://paganel.world/nowamugibeludatimolobb1dqe.pdfIn PDF document text
    • https://cdn.sqhk.co/xamewivuvus/YZBgcbV/pujikanamurukuvawiko.pdfIn PDF document text
    • http://lighterusb24.site/78988160639pha13.pdfIn PDF document text
    • https://cdn.sqhk.co/vilosezuj/cyshehh/frontline_battalion_hoi4.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/iejehid/42090044640.pdfIn PDF document text
    • http://izzzaaa.space/39836544239rb84n.pdfIn PDF document text
    • https://cdn.sqhk.co/jazorawa/16aWiis/jolegazotuxomebolanowo.pdfIn PDF document text
    • https://cdn.sqhk.co/nububufi/ifWidic/6230137789.pdfIn PDF document text
    • http://mebets.xyz/76365769619h9nap.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/aLlx0hd/knight_joust_idle_tycoon_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wasefago/jeHLhf0/classic_knife_throwing_game_app.pdfIn PDF document text
    • http://airned.ru/what_is_timbre_of_musicoga2n.pdfIn PDF document text
    • http://unonatur.space/puveditopokekoj99274.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/ggjd6ih/old_time_gospel_songs_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/bgihbhb/zafefizenemuburinebu.pdfIn PDF document text
    • http://brumbum6.xyz/mossberg_590a1_magpul_stock_and_forend43b5z.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/mhg5dih/zegagikigazonu.pdfIn PDF document text
    • http://gratoramaa.space/76027605901mhubq.pdfIn PDF document text
    • https://cdn.sqhk.co/kalusoxat/x1Io5ij/9723556892.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cc968bdf-8a18-4a65-a72d-893c706ef441.filesusr.com/ugd/bae363_5f3436b21078430da7e9b302a913f3c9.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_21ef0510b31f4b938d64a6f095cb8ad5.pdf?index=trueIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_7fe53bc9176d479b81634e99cc7c4028.pdf?index=trueIn PDF document text
    • https://1fc3e790-19e1-43b7-bae7-d09a953f51fe.filesusr.com/ugd/2c608b_2e4ee5af845b44eeb1b35d1105401a4b.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_off0000ee73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE73 5168 bytes
SHA-256: 92c1ca8fb8e868757c9e5a2bb84c956213699e42f660c08e9d039efc7054a49b
font_01_sfnt_off0000fffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFE 10520 bytes
SHA-256: 94d82e80a0fd7d4586c017e86ff9b6dde37e9c1f0ab57b3f9f7e4558fe35fcc6

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