Malicious PDF — malware analysis report

Static analysis result for SHA-256 669d099001fa0774…

MALICIOUS

PDF

124.3 KB Created: 2021-06-27 08:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4b68fe0261d6b5a6c87b8fc97f84c6b7 SHA-1: fc9edf302ad1d3232b2c9bce563d33887085a75a SHA-256: 669d099001fa07740aca8c6fbc6edf6fb8da2b5b69eabe357b560448e96e941d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The heuristics indicate the PDF functions as a link farm, directing users to compromised CMS upload storage and disposable hosting sites. These links are likely intended to host phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

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://say-international.eu/userfiles/file/gomekag.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a67ea2da9---33913231918.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/29319669368.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af80b195a4---ragowotefabize.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/27483317447.pdfIn PDF document text
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/borimepaxuj.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947d6b77278---92595070484.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/18422627979.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b93971247f---31378592319.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/13205264620.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///riligisuwodel.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/zosezinufepinexujavukigel.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/fasabebekepajefe.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/a13ccb88984250853355236177d9af00/48599392170.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/e56d8b90fbf8a11313458d4924d414c8/71847549223.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4da8537628---nexonuxetopozad.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607775b8da60a---tapavapasudedaridu.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/jivev.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/3boekpn7as9j3sleb40c5oit86/66134635626.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/7ab0bcfdd1c8bf04ac4e7ecdd99a1c02/suvadomu.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/golelonamofatimifun.pdfIn PDF document text
    • http://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/74719577719.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608aea0003331---99003928830.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/7fcf253479183c5c9b3eac8117acc9eb/13503563946.pdfIn PDF document text
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/13934604681.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607161836c0f3---1581981684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=lax+to+rome+directPDF 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_off00017f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F98 10272 bytes
SHA-256: bb81a66513a424d91fa0a74a2f8a2cdce140a795ee87a31db34d42e146857bbb
font_01_sfnt_off000196bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001aed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AED1 21068 bytes
SHA-256: 6a0d54718e62b30951a85554d32fe3a62d48c89b6c4dcfd916419ed3d98a594e