Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c78917667822e80…

MALICIOUS

PDF

86.8 KB Created: 2021-08-04 16:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1b7aaa9edf9e050f167c4356ac467f12 SHA-1: 30f703a0cb8c1532835c49d9a986921102147f8c SHA-256: 6c78917667822e801ba84b6f36098d00d3b3f089b113f34ca8a7e4c29a71825b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external resources, many of which point to compromised websites hosting other PDF files. The heuristic firings indicate this is a link farm designed to direct users to potentially malicious content, disguised as game downloads. While no scripts were explicitly extracted, the nature of the links and the ML/ClamAV detections strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f72f49b3c1---69758745957.pdf In PDF document text
    • https://pbchistoryonline.org/uploads/file/fowapimemimogux.pdfIn PDF document text
    • http://kag.fr/userfiles/file/37439201570.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/10873956244.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/030417017633.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/zumotavuxoti.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/79025326003.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609777c4a186c---10854411318.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/c495e9d7db385c1c5c4d1746dda42330/74575409791.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/15368914608.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/87869070380.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160898ac20efdf---76672103696.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc0347f9d2---zufozojejonerogodupav.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210714_061FA58A75722576.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/pefusavebunatazozozovona.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/91961600279.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ade006b3cfb---roxinasifatabegefuposobu.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/fafiriporadezan.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/19227972018.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16097935fd0a01---82232327434.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/io17sh5a2odh5gu2b5ircjs6v0/39994446991.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/rawusorurufoguxemiket.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/43099320470.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=gta+san+andreas+highly+compressed+200mb+pc+windows+10+downloadPDF 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_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 17492 bytes
SHA-256: 594a2c51bd0479f9f583a25ba54a50682adafb863d81c71d7492abce64af4468
font_01_sfnt_off00011871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11871 11636 bytes
SHA-256: 0a474f88babed15765b07616245ab8d4d4f47448a442c9e34f9c477112aa23c6
font_02_sfnt_off000133a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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