Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f1ca9131cad6f5…

MALICIOUS

PDF

84.0 KB Created: 2021-07-09 00:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7bf0e5fcb971c9ba178faff66de19dc SHA-1: 1c2ddfc4c0bff33e7d1f0460718b15acdc623ddf SHA-256: d3f1ca9131cad6f570e2a29f5f374337bc1aafc35c8b3393a8442dc55537ff7a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious or phishing content. The presence of multiple external URIs and link farms indicates a strategy to distribute or redirect to further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://laborke.ru/uplcv?utm_term=tongue+and+groove+flange+dimensions+pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088183a411cc---lizevozukinobu.pdf
    • http://residencecarlofelice.com/userfiles/files/81942491771.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092119d19f02---7683217442.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-5-15/20210515161710218408.pdf
    • http://apcmagon.com/userfiles/banedepowezegujerinitum.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/11d63e2b001ab28fc6dbabf3e1ee0ee5/87674427239.pdf
    • http://lorichphoto.com/pictures/file/kumizuveluso.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac62196d33f---kavujuxipomebatugubijebed.pdf
    • https://planet-for-events.de/userfiles/file/97414142448.pdf
    • http://humanitool.ru/userfiles/file/31634949054.pdf
    • https://tmtteks.com/files/zokawowon.pdf
    • https://www.tanyadantus.com/wp-content/plugins/super-forms/uploads/php/files/914908d081476eb00768f0df6e865c78/sevigix.pdf
    • http://www.euro-fly.eu/userfiles/files/tizalumozatesufodukubene.pdf
    • http://www.aadhar-interior.com/userfiles/file/41822243930.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af2c989d93f---52357039273.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/pixuwumadanotadov.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/467ffcfc373495f64ef43c14c297e636/fijalasofasiwo.pdf
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/f49c864a8e9226f983de8cd5d30459b4/90858426834.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094808cb1686---16378746976.pdf
    • http://hurtmar.pl/Upload/file/84872221046.pdf
    • http://dedanskecasinoer.dk/userfiles/file/jejixudoguwopesizo.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/a80u042o7kqea1anfbs9vcano3/tuwovezesewobu.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa40d3b6e86---30926652899.pdf
    • https://fanaf.com/article_ressources/file/60070084440.pdf
    • https://tort-art.ru/userfiles/file/xorapovizok.pdf
    • http://quaretti.it/userfiles/files/gopiloruwefutidid.pdf
    • 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_off0000e6d3.bin
d5b015e8a527c2869d8b5c190584d701fa82d723646eaebf42024da22c11a1c1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D3 16380 bytes
font_01_sfnt_off00011152.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11152 16792 bytes
font_02_sfnt_off00012969.bin
93a74ed8880a31c2a7e0374854aa1dadf27f8b9843eb03bf47d71500432cfa4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12969 10872 bytes