Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0aacc4fdcf25aed…

MALICIOUS

PDF

79.4 KB Created: 2021-09-04 08:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f0301180c5d77e1c77b94b10ee479030 SHA-1: de677bb3b85e632adf5c891c91f67e0339c8749d SHA-256: f0aacc4fdcf25aeda807d61fadfb556bd4c52a4cefe5fa2e9f63678be712fc4e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to numerous domains, many of which appear to be compromised CMS uploads or hosted on disposable infrastructure, designed to trick users into downloading further malicious content. The presence of external URI heuristics and the 'SE_DOWNLOAD_BUTTON' firing suggest a lure-based attack pattern.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=weekly+healthy+meal+plan+pdf PDF link annotation
    • http://domingo.hu/ckfinder/userfiles/files/lominabofimozekokupolo.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d42e4c01b00---malewovuzun.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/puvitizi.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/81165905306.pdfIn PDF document text
    • http://hnsunnyfood.com/d/files/vudinefu.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610cb0ec311bf---10684474210.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/d1hobno3kprepaai24irkfb7c3/buvipadudafav.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/xalebubafavina.pdfIn PDF document text
    • http://medica-brno.com/files/xapuwut.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/zivagamorimafo.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f45640a907---98084317092.pdfIn PDF document text
    • https://service-panev.com/userfiles/rukiropufivu.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/8941736818.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/82668537790.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/gowosizapoburojuxixe.pdfIn PDF document text
    • https://thietkevuphong.com/uploads/image/files/15924417251.pdfIn PDF document text
    • http://rowanfamilyreunion.com/clients/28915/File/duvajojugegajesukibo.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/lhmdnf1an5n1f4mbo7kekj8037/waselizekalufixikor.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/274636241.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/92733433968.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/xabevof.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/vojokotat.pdfIn PDF document text
    • http://toonesk.com/upload/43148609794.pdfIn PDF document text
    • http://splogservice.ru/content/file/gixiwesibubu.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d9d4d4ae3d80b9c6c35fcb83476a77a0/wopusoximopujupozitex.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_off0000d22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 18020 bytes
SHA-256: 05a203635943f1f32b10cf158fc591fa7b2e63f024d1999d052b4a9517983342
font_02_sfnt_off00011852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11852 10480 bytes
SHA-256: 40b01c681dbdc7a8cbf8aabe4f273a73518b8e2c32bceb3d7b1dc624e259ea71

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