Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65f0f92c41007bb…

MALICIOUS

PDF

89.4 KB Created: 2021-06-25 20:10:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8c60c0bc7891158d689132b195bc89f SHA-1: ba20ecd6a9e9302b78c1226455c34aa666d1471c SHA-256: e65f0f92c41007bb4cafb078bad49648e872460bd7d38cdd5c8aaaf6abd0350d
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. This behavior is characteristic of a link farm used to distribute malicious content or conduct phishing attacks. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or trojan distribution vehicle.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160927a8cb02e5---rekexuvorewovoxiwomisig.pdf
    • https://commonwealthsportsawards.com/userfiles/file/54354211746.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/214ea782ed10ec1e3937a48713d3f2b9/28546690056.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835fbce8e17---kalil.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/73vls53sfg08an2fjvli0kkei1/koneruzodobesoda.pdf
    • http://toeicspeaking.net/_UploadFile/Images/file/wevolamowipuponifizux.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/s7b5ve7g5jm7tliqjdcce9fjpg/1550765621.pdf
    • http://tlxzkj.com/uploads/file/041903394891.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac7d2dca7d---16415490893.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/f6dafa8d86f5898d430fbbc13c907a6a/33918632613.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d557f732c3---netid.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/894099cfadd5d9958deff7cf9ed167f2/fekuragidoxugotujebizajod.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a7ad68226---25373296498.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/2h11gp41lvrkimcugle96bf606/80371629257.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6ace63fb1---soginetabudon.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/3ed43739b4c6eb8ce6a2962a39ac79a5/powezuzonuriko.pdf
    • http://taeguektour.com/FileData/ckfinder/files/20210528_0C3159A0147F8C9D.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd47949763e---limotutogolenibemudefof.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2863499c7---tegedenasixavawisefuziwux.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/94898f1c39f28b17dfd7c586f2903f85/40634070558.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094dab34f432---rubalukupapasixavu.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/dq4nmrn6pp23779kepvl7436u4/minovosu.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/9b9efae420ab15bd6f20ad05ce9885bc/87530594725.pdf
    • https://summit-christian-academy.org/scauserfiles/files/67079549489.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=basal+cell+carcinoma+treatment
    • 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_off0000fae5.bin
8318ed556f9dcb7b6050f64ba954069bca11f3773335c53f1bd7d39b5801e6be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE5 10444 bytes
font_01_sfnt_off00011299.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11299 16792 bytes
font_02_sfnt_off00012aab.bin
87a8cb693ab94585a6a8cecaacf61de4c49f4560599b48c4866a7553cda50921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AAB 17672 bytes

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