Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ac11a9365fc627…

MALICIOUS

PDF

117.9 KB Created: 2021-06-30 03:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d4c0323189aa2c2f227dfd41dbb2282 SHA-1: 0a1a85c3fd560472075bbf7788fb3e8eaa418b0b SHA-256: a6ac11a9365fc627dfa633aabaf745a85c418931c9d88d9a6b201bfdf1bfbc67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with many URLs pointing to compromised WordPress upload directories and disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yellowstonewildlife.com/1046116850.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/791215d71ba964fc2bbd37a8b409c53a/dikawinanumaradoja.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/16089c990a3fe5---66905242780.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/85e22d83a669185257c4d29f4c5034f9/44863763890.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16093aa412b6ae---40410315059.pdf
    • http://stpatricksreunion.com/clients/84553/File/tabor.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/7b9q34k0j31766nga7af5fgl75/24340219959.pdf
    • http://shipsupply.ru/userfiles/files/vezibitazerujalevekop.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/7c9fa942aad39e7151f892833079132f/10201003916.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/1aod2s1dcabdg6m8s7uk4nguq0/78340983375.pdf
    • http://anandamsanyal.com/userfiles/file/narusadoxafaduforibulex.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b00e57a32ec---57148882074.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607314d36557b---tabelafexadu.pdf
    • http://ilovemynewstemcells.com/clients/865932/File/57174403353.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/24d60bbf2dfe32823f7f7c37753ea48b/nepifugonapekoduvuk.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984de6d096b---10897001468.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a18d2d20551---jidig.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160742ed402265---27027785423.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c3889db62---kexibizedekukanojigedab.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/e6b1467beb6ebdbfcefd083af23a885d/sunagi.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/mhkg4e6157vkgl8en6m08o00j3/fipedinamofixufojorofa.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/qlh96hp6p5q2o0bi1j1q9u2m18/veludiwirumefoluzijetovoz.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d6555b5dd02---nanozepazabelotoxotugimi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=david+copperfield+90s
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000169a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x169A0 16792 bytes
font_01_sfnt_off000181b2.bin
981050ca1279d472beebe8bd2dc6222b55275400078d3ec3f1582ee5f9577cd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x181B2 18352 bytes
font_02_sfnt_off0001b19d.bin
1a77031e1ae708c23fe20060b4f32dae63bdb2f2e79c758f7da4f3caec65e923		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B19D 10768 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.