Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a467c21739ca974…

MALICIOUS

PDF

85.2 KB Created: 2021-08-02 14:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5a0e67c3340bfce9fc6659fbcbdb73c9 SHA-1: 5d4ba721eb569cf2029e58b3ad12ce8ae4f1fbd4 SHA-256: 2a467c21739ca974ed2739e07ef2f83017b6222e879b29b0ad1b897943c2b2fa
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 a high-confidence ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content or phish users. The presence of numerous links on disposable hosting and compromised CMS uploads indicates a deliberate effort to obscure the final destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16094df7d5b1cb---64156877576.pdf In PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/24334411df62d0b98de0fa9edf8f10e1/mizevubawuxiwemunukalivow.pdfIn PDF document text
    • https://petek.biz/resimler/files/99471907616.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/gc7l4hble4f5fn90mer1255a8o/94449895571.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/46837429714.pdfIn PDF document text
    • http://reclamesticker.nl/images/uploads/file/xutugibulajole.pdfIn PDF document text
    • http://altinay-law.com/images/file/pozefokodubimalugun.pdfIn PDF document text
    • http://fuga-hotel.com/CKEdit/upload/files/52639332208.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c1014e838---jalamowobuba.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/fqf48pk0mh4him6f7rr3t5gnr9/mabawa.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/40993330951.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210601210459.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/jidixebinagisof.pdfIn PDF document text
    • http://flambotour.it/themes/userfiles//files/wokizunajudesotatafojexig.pdfIn PDF document text
    • http://asfalon.com/__files/file/visefibatejozuvasananu.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/13629183684.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/vukeninakivezego.pdfIn PDF document text
    • http://samilove-payitforward.com/clients/f/f9/f9b0b202ed5d2cb263a89f8a9bd08a94/File/banejakirubujejexajiju.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf1f8e5c28---38294142912.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609747c01ca63---zuwenozopikalozuxeg.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/1607712173.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100fc21b6511---46430143503.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/31676857753.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a960801930a---39134789438.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f2101b26a71---35230631523.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=contador+de+d%C3%ADas+h%C3%A1biles+m%C3%A9xicoPDF 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_off0000e6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 11304 bytes
SHA-256: 1313bd85e07e3fa86cce930cc64965a85e1dc4337a77852efbaac0872895d5f3
font_01_sfnt_off00010069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10069 17520 bytes
SHA-256: 4efa14ea419f9bc8ccc49dd9d7f31b488a378dc266ebbe1a2c06abad4f4131d2
font_02_sfnt_off00012d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D07 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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