Malicious PDF — malware analysis report

Static analysis result for SHA-256 0714f68cee933f23…

MALICIOUS

PDF

69.1 KB Created: 2021-09-16 09:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b0e1ad3a13d24efd31b48fbca9a78ba6 SHA-1: ebdb79711184d48445c617fe1a85b89cfa87b8ba SHA-256: 0714f68cee933f23c04e1c927a37c2e0e20b8d8f67f0c944a0dd28aad0cb64e4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The heuristics indicate it's an image-only document designed as a lure, containing numerous links to potentially compromised websites, suggesting a phishing or malware distribution scheme. The embedded URLs, such as 'https://drafthe.ru/uplcv?utm_term=cordova+android+widget' and links hosted on 'ar-intl.net', are key indicators of the malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://drafthe.ru/uplcv?utm_term=cordova+android+widget PDF link annotation
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/kmkaol3n6psrbs1jqb6vdrrv25/vomaporakagebus.pdfIn PDF document text
    • https://optical-axis.com/uploads/files/202109110134041474.pdfIn PDF document text
    • https://rgcsmt.org/ckfinder/userfiles/files/renewegumuriz.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/ratopanijodof.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/2027309040.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/97486342560.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/38627238956.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/55227421016.pdfIn PDF document text
    • https://computerzone.pk/file/1004216087.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a15f01544---kofovegawoxuwogivatipev.pdfIn PDF document text
    • http://all-paca.com/ckeditor/ckfinder/core/connector/php/uploads/files/pixepexopikojodurapozato.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/jawenaw.pdfIn PDF document text
    • https://zerling.eu/nico/images/files/pemafe.pdfIn PDF document text
    • http://packamate.com/userfiles/marezazido.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/57454184799.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/1552841469.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/62511566790.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/85214759095.pdfIn PDF document text
    • http://sd-admin.fazendapenaazul.com/ckeditor/uploads/files/polofevewedunanugojesewe.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b12fb0b0ae---motatot.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/vukamexum.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132a11950040---zevumegijusal.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/tmp/49549681571.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/17058295364.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_off0000b470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB470 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC87 10392 bytes
SHA-256: 51ae7bc3df00d863a6aa8ec97c4be61d670dbdfda730642705bebdd82e027eaf
font_02_sfnt_off0000e406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE406 13860 bytes
SHA-256: 52284ac70a2f4559f0ab31e71595e31b0517e9778f801c57dc628cae97d1ddc7

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