Malicious PDF — malware analysis report

Static analysis result for SHA-256 7829b89670054e2d…

MALICIOUS

PDF

81.8 KB Created: 2021-09-10 08:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1df4f0928fa031ddda1bb8e3b04d3561 SHA-1: 2ed3cb9999522023f19fac09f37c85a5218c8a32 SHA-256: 7829b89670054e2d5b050875de4ef104cf50506b78fe7f1d8e88f0a8642285d4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a QR code lure further indicates a phishing or social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=ios+14+qr+scanner PDF link annotation
    • http://mudrkanuch.sk/editor_uploads/system/files/pugavesovoniwum.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/54712437392.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/1209295718.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/1c5fcf879302d4e026e0b0c50aa8432b/56846550806.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612f948104ba4---kotibimonapeped.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/49432800384.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/86965112980.pdfIn PDF document text
    • http://brlairport.com/images/file/rojuze.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161384358b1bde---19232484841.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/sowepinubumuzax.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/xejovepowubonugo.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/vuvazoxatuxazok.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/medigeruxivutotu.pdfIn PDF document text
    • http://riverside-plaza.com/upload/userfile/files/wajuw.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/xegetiwabivenirunefajan.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/12893778532.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/9385333749.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/39587696557.pdfIn PDF document text
    • http://dinhvi5s.com/images/newtech/files/gijodonubovipojaja.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/balasujamagexadako.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/bijakutedikumawikar.pdfIn PDF document text
    • http://pcserviszlin.cz/ckfinder/userfiles/files/tixovexusag.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/wejuwejobibes.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D0 10212 bytes
SHA-256: f6a0e0af4ac707e3da0f1410cb7b314579ca148b2e04e0e82401edd4f647f2cf
font_02_sfnt_off000108ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EC 18912 bytes
SHA-256: deb38bd7b49da29aaaeb8a3880ebe26cac9f1aa15cdac080cc921caad1008689

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