Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe0d40d7b7bb49f…

MALICIOUS

PDF

85.0 KB Created: 2021-06-27 14:44:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6b1204a8e05dcde2af61d4bb7ad864f3 SHA-1: f4626318a6d257148e1878ad3f2225cd76d97d98 SHA-256: bfe0d40d7b7bb49fd2bd7af9974f1a4a839a51531d040b3f6330005b965b12ba
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable binary data, suggesting it's not intended for direct user consumption but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://oniceh.ru/uplcv?utm_term=native+american+guided+meditation
    • http://micronforgacsolo.hu/UserFiles/file/41432202953.pdf
    • http://brilspa.ro/userfiles/file///taxitu.pdf
    • http://evergladesharvesting.com/ckfinder/userfiles/files/gobunubegunarisibol.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/c76c853fb96f1c4516eff21cde87c1bb/52011269807.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16088701695cca---36729889464.pdf
    • http://kimdaiphatsteel.com/Images_upload/files/gemevutevenukij.pdf
    • http://apexibd.com/uploads/fck_uploads/file/nexatukuji.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/4b993c688e3d59c12efe489372dc0d5c/masarosa.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/o02trvnolih4jmcsj46o203vi2/9816035043.pdf
    • http://flygarfield.net/userfiles/file/mopafuluke.pdf
    • https://abofahed.com/userfiles/file/61973712843.pdf
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/ruvidadosafegunofov.pdf
    • http://thementalhealthadvocates.org/files/userfiles/file/pubelotefewasufon.pdf
    • https://stopserv.ru/files/file/tegigujekipibuxebiset.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073467f3f61f---1407236093.pdf
    • http://koszyczarek.pl/userfiles/file/10503103890.pdf
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/7de0310aab821c51d63e20576edf8aed/tobubavapav.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7e25894bf---mebabidojumifukitubado.pdf
    • https://latework.cz/soubory/rimugefob.pdf
    • http://studioboscono.it/userfiles/files/muzitafopogerajeloge.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cbced5c25---57956874597.pdf
    • http://bscartridge.com/pic/jobaguxidepavag.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083336930635---8951526117.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c95d50cbb58---45390712076.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_off0000ea90.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA90 16792 bytes
font_01_sfnt_off000102a2.bin
7e5bbd7630544d4794d8613e8c1d3262c9eb7ae839d61af375b423b2a204ffc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x102A2 16896 bytes
font_02_sfnt_off00012e72.bin
06b17417d5974fcd6f2f93ccd844c4e808861a29c87fcf03721ae74efcaaa2e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E72 10644 bytes