Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3e047469bbba11…

MALICIOUS

PDF

88.2 KB Created: 2021-07-18 14:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 223d3298de0c23c9cb3da2737cdf71bd SHA-1: a4cd47af9b1f347399c526b30977ddf5e7d161e5 SHA-256: 6f3e047469bbba117eb5c4a8c052daf4c72c2fa7f1be90c8919c82ad9ae93800
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://xn--80age2amlc.xn--80adxhks/pics/images/file/guvetowiredegawusuv.pdf In PDF document text
    • http://101-games.ru/images/uploads/files/84058785784.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30309235d1---22809545304.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/d0bf8106963350ab8d56bbcb79038bdf/11009322298.pdfIn PDF document text
    • https://ilcaminodaugo.it/file/7231732064.pdfIn PDF document text
    • https://peterdegendt.be/file/74046147726.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/033bc437e9dbe3498453667dacfb83ad/sukabumukazofa.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/8fb31fa1633a2890cec37d87c0dad279/pobiwiwufami.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/bemanilabadi.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080a78d24532---70023769424.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/8692051434.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a25dd3ed2c8---85356523610.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/95739406b85f11bc361fbecc50bf37eb/72404100013.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/370435a2272617c2386dc0b18243670c/36977632817.pdfIn PDF document text
    • http://infunplastic.com/d/files/21891907801.pdfIn PDF document text
    • http://lesmashclub.com/imgUpload/files/90416261659.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/karobesiraxobovopumet.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/4f523ff1fe2f44c7644142a6a7e0681f/nenuged.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f57f7d7e87---morisewusirem.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/o7f8kjhl1gqt75dk1qa2dmiht3/vobafiwetujaguvapuzi.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a2c28db8f1a79c6164560a800a118e0b/luwezafisasowobe.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/lamelixokizaxeluxuniwikew.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/98d4a1d732a7a1dc75ec3089bec7ff9d/migizogufawebipavisivevo.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e9755bc5289---55708275133.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=combined+gas+law+worksheet+answers+with+workPDF 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_off0000f2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B14 11044 bytes
SHA-256: 418fa1a42241b7381c300e7a20b85de2a94a8360ebe01849bfaf7531733a9f32
font_02_sfnt_off00012470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12470 17936 bytes
SHA-256: 542f84f4c47121fa3b9bf666ab0db0c7b40bb3b46bae704dc268f70241e2bd60