Malicious PDF — malware analysis report

Static analysis result for SHA-256 06feb3303b659d40…

MALICIOUS

PDF

82.1 KB Created: 2021-09-03 06:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 457d0fd86d715b6186dba090f27d1863 SHA-1: 6302db3f492c13ca975b90e1105000c4f64c2af5 SHA-256: 06feb3303b659d4084028a94bdc795cbe6ea11569695226940bd76e9b2aa96b6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites. Several of these URLs are hosted on compromised CMS uploads or disposable domains, suggesting an intent to lure users to potentially malicious sites for phishing or malware delivery. The presence of multiple external URIs and link farm characteristics indicates a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://cructi.ru/uplcv?utm_term=handbook+of+psychophysiology+pdf PDF link annotation
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/boxevezesenafosaxagi.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/14377701501.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107343707575---jokabototi.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b436f14a20---93709455837.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16ee915ae3---rewozod.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/98310467544.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/jukiroradojakirex.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/nupamuteresosopa.pdfIn PDF document text
    • http://beta-rc.com/upload/files/79291919848.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/mogajux.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/ludaxalunumubawefega.pdfIn PDF document text
    • http://xinyuemu.net/assets/202106/files/20210609151654787069.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612249b67fabc---luresogujegidaluxita.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086137eedbc9---depesujujokuwinuvitewu.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/81698308926.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f03ed42a2e6b7371fb0641c8a8886415/jinevejaxofepad.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/lanefumowukebiko.pdfIn PDF document text
    • http://allasclub.com/campannas/file/74152211263.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/uni8c1nk4bbd8ltctc9saf6a6l/85235974575.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/pebopafuxazanogololu.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607738926bf15---perozutijenatej.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/9fptcqa4jrcflf0dmhnahr9blf/wakezomasokumobiv.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/45421391909.pdfIn PDF document text
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/edtgvk8issgks9m2450kcjk3ic/werufofitulefot.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121e6e6569d8---wimowalisidunexivokifovul.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e98565db4---ketutibomerodawu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE95 16676 bytes
SHA-256: 90a0e337b8528531be9e090a68929cd72c8f7edb56c47f00a68a5287b1e2f9d5
font_01_sfnt_off000109ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12205 10908 bytes
SHA-256: 49eb635101db7aeb282a502288177ee868544d6d2bff51e281589837fa20bac1

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