Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e1195a991835f62…

MALICIOUS

PDF

104.1 KB Created: 2021-06-25 20:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16a6a1cec64b7b151ef86140ad43e66b SHA-1: 0791988420205cd1ee12ed3ee91b17d846cd7d7a SHA-256: 6e1195a991835f62e706aeea05649be5f15614886552c548afb37d56c70ec111
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites. The primary purpose appears to be directing users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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
  • 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://topclassgreenery.nl/images/file/24162523574.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084236cc538b---11274064411.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/1080c1210a425a789aba813c0cfe0505/18852580310.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/e6bd0cf8706f3b41fb07de57e41765d9/77630481510.pdf
    • http://weberstellen.ch/userfiles/file/remaxozoluxirozude.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/an5vasj61bf2qc7p7kq6paioqm/xetapewop.pdf
    • http://aep-tc.com/cache/fck_files/file/11696642440.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cde404dec4c---26144431602.pdf
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/e65be7f0edc58c2922bdcf088834d1ed/lomapiwu.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/3bb0df30c8537d8869ac4a24d1328aef/71069315114.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608325e067123---42964946052.pdf
    • http://anthonyvienna.com/sites/default/files/file/90709624706.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac860a852c6---92374624991.pdf
    • http://bigxra.com/uploadfile/file/2021051110312973499.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/938c0f32c7c25b108c69d32bee88e8aa/97847273473.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608462b3e6962---9114971120.pdf
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607777439b338---60991028819.pdf
    • http://agiusfuneraldirectors.com/files/file/12834030785.pdf
    • http://bannermaul.com/userData/board/file/45266628959.pdf
    • http://chikatere.com/Upload/files/1008627586.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/s85m6tvqfb9ov9su2jbpf4t2g8/76311039447.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894bc74edbe---66103857507.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c864fb8575---44065372907.pdf
    • https://travelinnsuites.com/nbloom/fckuploads/file/78135337557.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6750981c02---kokub.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608920ff34f0a---57399031241.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=halsey+without+me+roblox+id
    • 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_off00012ea2.bin
29e3eb7e6a078e996a9267b2ddb50f8a590357e7e03b12b78cd6a79b76fdf86c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA2 10940 bytes
font_01_sfnt_off00014807.bin
fafa9a9b0672348bf069dc9fa4399efd851748fbf640083a209f23108a0bf77d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14807 20836 bytes
font_02_sfnt_off00017b09.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17B09 16792 bytes

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