Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01bc879180d10e4…

MALICIOUS

PDF

75.6 KB Created: 2021-09-14 04:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3beaec6815fdb77e7a9e94622d09f9d2 SHA-1: 3235f97d6b4655e9363e4e3d5876047fae14c172 SHA-256: d01bc879180d10e42fc3582841d12b19b19c6c77473aee158a6f93bd84e3809c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to redirect users to these harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pixomot.ru/uplcv?utm_term=hamraaz+app+new+version+2021 PDF link annotation
    • http://eviljoy.com/UserFiles/File/39943856955.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/23217141369.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/bafojifogeziwotunuzukamob.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/pinenuzetigunixoxig.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/81702033788.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/tananadatatot.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1630990608.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343d4660500---67044252117.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/makiputojij.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/42643502150.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/mimogugotutapibe.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612edfc165f39---wogepavapafip.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132af256ad26---31900009328.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ffe93bb266ba79338ab7f361b893f1c2/vavikip.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/61363454262.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210906154804.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7791aeef5---6924125792.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/66512795630.pdfIn PDF document text
    • http://baove247.org/upload/files/4537051223.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/64404366062.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/14571406689.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd550eb352---kalatewejimarozukugugup.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC549 10768 bytes
SHA-256: 2e5a0f34a68415ec2262eeb6da90fa46dae60790956c41b9a0272477446ffe1c
font_01_sfnt_off0000de1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1C 16624 bytes
SHA-256: cb03cc0594665bc707c724d2398ddfeddc5e6bbcb688b718720595cd02ba1a92
font_02_sfnt_off000108e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1