Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a501b26f69bdb0…

MALICIOUS

PDF

111.4 KB Created: 2021-07-31 05:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d7892c7b9d44e6ab42fc6609388087ea SHA-1: 04752ce2f0882985dcb27a343c91aa4d4afe707b SHA-256: c1a501b26f69bdb0ddddece983c8e585360a0c94e3a5cc1164649f101b4af053
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

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://nomylo.ru/uplcv?utm_term=funciones+hiperbolicas+inversas+dominio+y+rango PDF link annotation
    • http://ahchala.com/img/file/59835056364.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105032121158714.pdfIn PDF document text
    • http://epoxidice.ro/mm/file/juzujamimivugerus.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/53602428394.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b1967d66a---89007072491.pdfIn PDF document text
    • http://dollreunion2020.com/clients/4/43/4392dc7a9e9236654a628da0af121bbb/File/mukopazarix.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/aa62e89d13b346ef5a24717ba376f7ca/10412539928.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ff8e2939b---temetitorixep.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c474c54571d---27316474638.pdfIn PDF document text
    • http://jfk1969nola.com/clients/873000/File/75915049188.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c832ead64a---38930080704.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c874cace42---mesaxagumutilamine.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/97248125698.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/n69oej8s6v65et0qt6lhf7j919/zenojivurewire.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/97128703177.pdfIn PDF document text
    • http://ha-sine.com/d/files/zasoxelonasoju.pdfIn PDF document text
    • http://chieucoingason.vn/files/duduxegujofup.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/vi420fmvil3lq6s7mufgs6bgff/15873779073.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/parimodafufuzekobomepeso.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/52937840695.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160dbdacfbb341---3464947957.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp//files/buxal.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/94797513483.pdfIn PDF document text
    • http://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/danozukemap.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e145e6d56d---61553548486.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001315d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1315D 20168 bytes
SHA-256: a0bb42af7ffd04801a026c7f96c2744e2d09c77765539c0bcdd1e463f9009be9
font_01_sfnt_off000165a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165A9 11260 bytes
SHA-256: d1fa74da986a4abb9fa82a110595b277bfc5c90687d246eadeffd650f4096807
font_02_sfnt_off00017f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00019786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19786 16188 bytes
SHA-256: cff13d2b7e8e832183d48191555c2f6cc6e1e9ee2bb427d40ea948c48fde5423

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