Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6427be92808539…

MALICIOUS

PDF

87.8 KB Created: 2021-09-05 15:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dcb07446326c2045e202d88ffaa2c5e1 SHA-1: 2fec9b492c5b257cfca5a5859e19a1cf6771f46c SHA-256: cc6427be928085390c628da525dc175b94ea9b48f25a607683e40234a41e383f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with many embedded URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://lamaisonducoeur.ca/upload/editor/file/51987322797.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e5b34c7068---7245604666.pdf
    • http://christschoolblr.in/userfiles/file/83514215393.pdf
    • https://veaodaibrahma.com/uploads/image/files/fosodivil.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab21cf1e62---dowed.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/d8ad8f7e07667c0f2349553f8bdcc485/fiwelixegexigasodibo.pdf
    • https://thokhoavietnam.com/upload/files/vugivixabowivalanawewep.pdf
    • http://splhardware.com/UploadFile/file/2021081519500473499.pdf
    • http://drjoecarver.com/clients/49355/File/pejizo.pdf
    • https://serwisnawigacji.pl/userfiles/file/44782220468.pdf
    • https://milsagliksen.org/upload/ckfinder/files/geladu.pdf
    • http://zzfcw.com/file/fkimg/file/65659394563.pdf
    • http://gandolfiarchitetti.com/userfiles/files/42831038233.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611263aa069d8---betesozaromot.pdf
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072758b25fd3---xuvepujej.pdf
    • https://topclassgreenery.nl/images/file/37037043184.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1f439eaf162e19954079271861640d46/37894593658.pdf
    • http://aozbt.com/clients/3/33/335f642cf73e2ad82edc7dd4a76dad4e/File/mejisafu.pdf
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kuxixivemurokusureligi.pdf
    • https://havanic.com/cache/fck_files/file/23758584093.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/128c40d5a14ec4eecc00d5e9087daea7/xibufemepagipaxitulu.pdf
    • http://spoilersmensgolfclub.com/clients/865201/File/fisadaxatilote.pdf
    • https://planet-pvc.com/upload/files/penuxizugusobima.pdf
    • http://luxlustry.ru/img/upload/wuvepijinemivijaxudise.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=obituary+format+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3d0.bin
c747552dfc263c1c4670945b3535361f75abbb68d968a074f8468d664522a4a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D0 17732 bytes
font_01_sfnt_off0001217a.bin
fd36c7bb3b5b2899e2235169b738ef53e2450e9ec2092e97a7ee5d7375b446a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1217A 10588 bytes
font_02_sfnt_off00013982.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13982 16792 bytes