Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d7aa66c4755842…

MALICIOUS

PDF

81.7 KB Created: 2021-09-15 13:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 17822e18fd9bd26b3be138377c682c0b SHA-1: 6b62123b11425a4bc5ea25466e492ec0ba8388fe SHA-256: c2d7aa66c4755842de283cb225e7bd1b22d9318267e3dc789ee93184f651ae00
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of using such sites to host or link to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://mulroyenvironmental.ie/userfiles/file/49064638768.pdf In PDF document text
    • http://afghansolar.com/userfiles/file/93644457567.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/74214803346.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/mexefewu.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/zudifemusagokidumununare.pdfIn PDF document text
    • http://congseng.com/uploadfile/files/73775899341.pdfIn PDF document text
    • http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/49087842407.pdfIn PDF document text
    • http://servis-hradec.cz/files/file/likuf.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/5728066130.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/davesiwewuketevomejujoje.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5f0030ea6535b6377cc01597bc7a2b82/70947878654.pdfIn PDF document text
    • https://tigaintan.com/contents/files/jiluvapivekagugogofuj.pdfIn PDF document text
    • http://hibertek.com/image/files/20210905_051059.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/8299f5c3acffc63fb99d654b7dfc0042/sunawuzopasupezidiro.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210908142030.pdfIn PDF document text
    • https://airxps.com/userfiles/files/jikamawan.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16138df43efb6f---bisadufujawose.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/juwexibedolugu.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/37344990575.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/geluwigafufiduxuvonenajog.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/nusogel.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/delakiwovupogeturofis.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1631274341.pdfIn PDF document text
    • https://tonmathunglan.vn/upload/files/xeneropurigenef.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/57048840875.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/tiner.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=android+bluetooth+connection+notification+soundPDF 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_off0000d889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD889 18452 bytes
SHA-256: 12df79bf171aa911bf47c8c13c81984668d318732c2ca8083bf1d78482300380
font_01_sfnt_off0001080f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12026 10796 bytes
SHA-256: 7ac83a43da8ac9808df5c9171ef34ac6fb04385973713f1bf3c2b62abb79239d

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