Malicious PDF — malware analysis report

Static analysis result for SHA-256 4797cf1fe4b7fd0b…

MALICIOUS

PDF

80.7 KB Created: 2021-09-04 03:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c2f39ebf5c5f73fe8ca0535bda120a5a SHA-1: ffb6d757578199c4a136a8e3b43040ebd5bf9cb5 SHA-256: 4797cf1fe4b7fd0b46e8d0ee5cb6536589fd7d0e33955090177f45910441da54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, suggesting a phishing or malicious content distribution scheme. The presence of ClamAV detection and ML classifier flagging strongly indicates malicious intent, likely related to phishing or malware delivery. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f06ad74b7---62150283636.pdf In PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/00ed9fbf88faaa5d63e45cc8ce86a543/xaterapexanaje.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/ligaweligotadozuguboxuwuv.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab312afe8c---15130476746.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b40225678e5---dudogilijunovawat.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608975c79a81d---2082021732.pdfIn PDF document text
    • https://tomorrowhubs.com/upload/users/files/90782762801.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1611ce9c3aa793---79661411773.pdfIn PDF document text
    • https://laps.pl/userfiles/file/gavapulamekedijefofini.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/64530115264.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/dcf4abee5bc89a25b0ba38a5eb08d79c/zuvemajapaxediwebijim.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/busuzeliwar.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/07/28/file/20210728_022048_163.pdfIn PDF document text
    • https://rajatotogroup1.com/contents//files/vezawubu.pdfIn PDF document text
    • http://unioncentralreunion.com/clients/3/3a/3acd25563584ef55397927d4124196c4/File/fugakoxujufeguwig.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/41877222505.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/vivazug.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/bakobijov.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cbcf509f9---tetubugunizabogawakizi.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f4dde6f5ab---woxiwavelojovivukewelipo.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eec09dbc75---pujesumixopokulufi.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/d3dfe6b7e4fc910079e71133af142bd7/jezepiluvegal.pdfIn PDF document text
    • http://primaneighbors.com/userimages/26062900202.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/jujumopelitugunu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=cdr+file+converter+to+pdf+onlinePDF link annotation
    • 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_off0000d92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 17060 bytes
SHA-256: 82705fca288b34ed7f203582a13b59ea691bc2ba77920ebd35c742b012f10422
font_02_sfnt_off00011dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAB 10380 bytes
SHA-256: e65bdc0c692756616122d82d9c4a0a84d8a2be270a3a5359ee0177010f61a09d

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