Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a82e8edd0b8171d…

MALICIOUS

PDF

85.2 KB Created: 2021-07-07 17:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 089106bf5ccaf41f38af8cc0fd33544b SHA-1: da67e03ad72bc07b6978f1c21cbddc144675ae2a SHA-256: 2a82e8edd0b8171d9575f947b3300da50871c2b11d764253839b0fe617c0e03d
176 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document contains a link farm pointing to multiple compromised WordPress sites and other domains, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs, including one pointing to a raw IP address, reinforces this phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://louvre.lv/res/wysiwyg/file/jodowas.pdf
    • https://alshaabcoop.com/userfiles/file/94196941371.pdf
    • http://svsteinfurth.de/radsportfiles/file/pavobutizod.pdf
    • http://vasvaripalmuzeum.hu/upload/file/13253169977.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/nt7hj1vtl5pogt6jisb65ncv7c/71553898376.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/d8b02a00fd8ddafeab1dee2716d53181/8945150793.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608954dd1e2e7---wopawowiv.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/a170e4ebc0d9d6ccebb4e6269c8fbacc/kotugonabudipi.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160913f34139bf---vajuzudevolugojafupuz.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160d195ba2d141---jipejer.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160b65e643efb2---61273242805.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/0mhcd724fso0ak2l0gaoi7kep0/zisutukuz.pdf
    • https://aspirans.com/files/file/181722062.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16084cc6411318---33744337243.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/178299ff6d3809983b6bda0fe96dcfe6/77160610976.pdf
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/kisenedamitabekatiro.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c28bb162604---34757830924.pdf
    • http://ballstonfamilymedicine.com/clients/861402/File/ruritogosozumupowolazo.pdf
    • http://simonide.org/userfiles/file/4807028877.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/a88d32129e5b984c470f1c702f04d3c2/volawo.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16098883f68491---polijuxosepef.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/3d15f1bb26dd6a0f6a6b85bb403cec57/jifugopefagizabebub.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ade442896---66166655313.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=9+circumference+to+diameter
    • 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_off0000e97c.bin
ca6042318d289c7b66f6dbaba5aabe1de24bda5748fe6b2b29f1a38cc42fcf2c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE97C 10592 bytes
font_01_sfnt_off000101b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x101B6 16792 bytes
font_02_sfnt_off000119c8.bin
deea4a23377deaae09926f5a6bc443c8cf3d6273dd4e162bf90ef5aaaef2518e
pdf-font-stream PDF embedded font (sfnt) at offset 0x119C8 17012 bytes