Malicious PDF — malware analysis report

Static analysis result for SHA-256 564de6186fa092aa…

MALICIOUS

PDF

91.8 KB Created: 2021-06-28 15:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b9a44fd29db71650bf60ecf17ca7b864 SHA-1: b14d4706a6f3e84df4e35b54dc5547cef7f55bba SHA-256: 564de6186fa092aa8bd12bc9267f3d63fddc71e38cb54681f115b236e4514018
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload storage, likely intended to host and distribute further malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond what the heuristics reveal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c79781f535---mivediponoxun.pdf In PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3951aa6c7---dutevevidobal.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/bezoxaboturuvomopizuzar.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa32894e9c---limomatotipuz.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a69a65af6---demamoxufen.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106030736001141.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22cffc7c9e---wilenedupaxunafedanami.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/65373860114.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/54208825160.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/87511735662.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/49400792746.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/2a2a67c74c7b3e23c51d1c0c290f474c/55346101053.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/fezopexaruzigafixejodo.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/lawaxonosij.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/miwurorupoge.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8daae6c831---munogeja.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d87a0af31---xuzixifajav.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160c305026a475---wotezanuvopagijipopo.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/sabofaseladugomopezasem.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/5b0e4b23c9313e32053c4704074d3ee5/patapugivolupemewinite.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b43844f4182---bimizurekafiwa.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd4aaa82b4---jibiwe.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b878800bdf---39879816761.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a7024b74d---37747083107.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=artificial+intelligence+of+thingsPDF 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_off00010424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10424 10596 bytes
SHA-256: 5da9a4a31652f18e08c2d40c85d9144766496493d88576dc6f120104973516d0
font_01_sfnt_off00011c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13460 16888 bytes
SHA-256: 5191b345be6bac38eaa5eec609c5713ce75faf5fc99833ecffa43440cfb22d87