Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7882eee8a340fd3…

MALICIOUS

PDF

77.2 KB Created: 2021-03-27 15:04:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9ebab3aa0757bf71d0a81d2f9d0ce713 SHA-1: becff2077c4cdfdaf6e2f4fee83b662d090ad663 SHA-256: c7882eee8a340fd35360c420b50fe1ab3f7a4593b0d62a8642b60af3fb92425f
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The heuristic 'SE_CLICKFIX' indicates the document likely instructs users to execute commands, a common social engineering tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://golowaki.ru/wix?keyword=change+password+windows+10+ctrl+alt+del PDF link annotation
    • https://cdn.sqhk.co/kizulajeli/NijKKTi/hair_salons_open_in_stockton_california.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/bhieEgc/dovurilaj.pdfIn PDF document text
    • http://giwitap.getenjoyment.net/donupadukedumojo.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/mgghbii/water_glass_lyrics_cannon.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/mekajawinon.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodimina/jiOhihf/83253265160.pdfIn PDF document text
    • https://cdn.sqhk.co/fivufotimad/ig2gj0c/sniper_elite_5_pc_requirements.pdfIn PDF document text
    • http://jojowezumuxup.22web.org/33374403715.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/669fa8db-5537-43b1-a3ea-1ae18963d1ba/34002997952.pdfIn PDF document text
    • http://vawinujofupin.myartsonline.com/2527189147.pdfIn PDF document text
    • https://03a45e23-20c9-4b13-8d21-50c2609e56df.filesusr.com/ugd/502f3d_ac1f1e8afaca46779249340423e11fad.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4402b038-7486-45ae-9adf-cfb2ed5ed1fd/samsung_xpress_m2835dw_toner_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ade8279-7aa5-4b10-a2b2-09e13d619047/english_speaking_lessons_for_intermediate_level.pdfIn PDF document text
    • https://acfcda0b-1795-4b40-aedc-9a0bc13047ce.filesusr.com/ugd/89c6ad_307b2f8bb40448e49b0159dabc319165.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/78e422ae-47f8-4b29-b2b3-9c27b10853b4/how_to_use_a_bissell_proheat_turbo_carpet_cleaner.pdfIn PDF document text
    • http://lenomona.rf.gd/29098369364.pdfIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_fe6e8c65b0e94a40868d71fe822cbeb2.pdf?index=trueIn PDF document text
    • http://dunoxoxuri.epizy.com/jotugotapewarozone.pdfIn PDF document text
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_5f344db742d742bcaa7fb3bb27fd4c84.pdf?index=trueIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_1c16e1fbb31e4dbbbf69cd26359c39c8.pdf?index=trueIn PDF document text
    • http://nojuvuxu.rf.gd/curse_of_strahd_revamped_changes_reddit.pdfIn PDF document text
    • https://82a15d5c-09b3-4b2c-b6d5-cdf01964cb25.filesusr.com/ugd/5adcb9_58cea800621d4340ae8ef44abbd1c711.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE260 5432 bytes
SHA-256: 79b762854dd0f32e647703e6adfd6fc414d4be518d5dd24180178100b8395e28
font_01_sfnt_off0000f4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E0 10584 bytes
SHA-256: 5c63b4a0ee43fcd251c13eddd5cbe154631dcb71df67b91b3620e2d919527980
font_02_sfnt_off00011943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11943 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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