Malicious PDF — malware analysis report

Static analysis result for SHA-256 0532c100349ee2ef…

MALICIOUS

PDF

152.3 KB Created: 2021-07-06 04:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f028b2352dbb07483c2c885ea741334e SHA-1: 797db10813fbf49db6c3162e80d8fc99d6bca2d6 SHA-256: 0532c100349ee2ef74e1bb7c20d0deca16bb4da3966a5e4589e6afe92debda94
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm or downloader. The presence of a 'download button' lure and callback lure further indicates a phishing or scam attempt, likely leading to a second-stage payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://nomylo.ru/uplcv?utm_term=my+physio+cluny+court PDF link annotation
    • http://prinsart.ro/uploads/files/64142248252.pdfIn PDF document text
    • https://summit-christian-academy.net/scauserfiles/files/togevepugu.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/b67cf0e9436185a97985d0273993915d/porikadis.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/44066893668.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079d828323f1---66740911154.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/vodanipalo.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/6fcd8c53a80ea5fc654224c14aa17d24/numaj.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/58e31ad9b081d9483f1cceafbf279680/kokovetakuv.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bd09da4f30876a3750614bca5afc82cf/zirafimuf.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160761a4def89d---bazos.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/a8aeff4ec9d097de47e5d4edf1997a81/86259797497.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609203d627170---noveresofazezefejaj.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/texivusojakunu.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/49813636336.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b22e63e48da---20909653690.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/83803507767.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/12039315571.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/not4v4b7putel6p7og7vlhi4rq/tabufekojino.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160856d108dbc7---54551532243.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/tiduluvurufabobojas.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/dexaje.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/99230418238.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/61f670d152f866057b1a575db0194bcc/4938538712.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_off0001f4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4EF 10384 bytes
SHA-256: 065aba008a9f4f2d9e42b709b0dfd81c393208570dbf430b7de846d4dbfc40a5
font_01_sfnt_off00020c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00022479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22479 18632 bytes
SHA-256: 1c3203fadd1c395cec0edcab5c92a104f993a216adb5c44c5c5adf66bc5e45e6