Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb6b3268bbf6457…

MALICIOUS

PDF

82.9 KB Created: 2021-09-22 18:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9766ee9bbd694646726d1fde932915c SHA-1: efa324e99993a1dc57d27bfa8dd246d1c4220eb8 SHA-256: abb6b3268bbf6457122d8f8481e36a477a1bbf0618f033ff0d189203d308b311
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 a machine learning classifier and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The presence of multiple external URIs and the link farm structure indicate a clear intent to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16133662aeaa1b---narisajidojaxujije.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f159ba2696---niselavuloteluxe.pdf
    • http://abwingsbuffalo.com/uploads/files/donezebokidewarogorij.pdf
    • http://dostrojar.sk/UserFiles/file/77238990256.pdf
    • http://livelyway.com/ckfinder/userfiles/files/zobugajunizalufidanu.pdf
    • https://kralpin.com/calisma2/files/uploads/19196402188.pdf
    • http://infinity8talents.com/userfiles/file/31740473039.pdf
    • http://tianlanip.com/filespath/files/20210913102704.pdf
    • http://kesherisrael.com/uploadEditor/files/xunisuberunopisegiba.pdf
    • http://52fotki.ru/ckfinder/userfiles/files/57879632548.pdf
    • http://specialcats.nl/media/files/64897598696.pdf
    • http://ozkayalartrans.com/userfiles/file/tesog.pdf
    • https://rais.bg/uploads/file/zilotarimugijuxodenut.pdf
    • http://autavrabek.cz/obrazky/file/99823324272.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/942fcbcd56497a165bad75a861c4658b/88736008490.pdf
    • http://thomas-zigon.de/images/file/93589163169.pdf
    • http://ximangsongthao.com.vn/app/webroot/uploads/files/fopij.pdf
    • http://toroisg.com/public/images/files/54103210443.pdf
    • http://marchmontnews.com/imgs/file/73707807596.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/9dbc911b1c7846a4d75bf4c3a2ca68c8/19139083200.pdf
    • http://costruzionibulagna.it/userfiles/files/59349499000.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613656b0af5a9---10018009697.pdf
    • https://hijaustabilo.com/contents/files/febujuw.pdf
    • https://abouelhoulgroup.com/userfiles/files/22873883653.pdf
    • http://takramaipai.com/mypicture/file/zuxenukanomaxemi.pdf
    • http://angelcabrera.com/FCKfiles/file/fumevekefumomosagito.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=hacks+for+roblox+pc
    • https://easyown.ddproperty.com/datas/files/73936163161.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_off0000dfd3.bin
24a478a5a010392a308b98ee445142bcea1bdfad96f555bfd131f42279cdcc77
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 10372 bytes
font_01_sfnt_off0000f736.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF736 16792 bytes
font_02_sfnt_off00010f48.bin
5588e0797ba97ff1c633049f8362fc705e8ffc58d49444859bbb7f177223611d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F48 18004 bytes