Malicious PDF — malware analysis report

Static analysis result for SHA-256 01424e291f13d7d8…

MALICIOUS

PDF

82.6 KB Created: 2021-09-19 09:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 6bf11e80c6a6514ea89da838e6b26192 SHA-1: d816a510d4899cf70f2d2ba5597985d341d2fb0f SHA-256: 01424e291f13d7d8b1540f34c6818f327da2a4c9538ffcb891a4b6c5d1435d8c
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 domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, aligning with the characteristics of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://smartmedia.ro/app/webroot/files/userfiles/files/zijozemodekilurujedanagu.pdf In PDF document text
    • http://elosc.com/upFile/file///ITX202109181344513298.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/44486406636.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143216527a80---24425239273.pdfIn PDF document text
    • http://pegastelco.com/pictures/files/5051873592.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141dd425fbda---ladenu.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/xedonakibunanaj.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/40882021930.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/c14hmskcgdia1i7capp3fb4l90/87547058193.pdfIn PDF document text
    • http://rtm-plus.ru/ckfinder/userfiles/files/losunaxelax.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/79128834874.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210913_9BA1E9C73E5D1983.pdfIn PDF document text
    • https://mrpressconsulting.com/UserFiles/file/rubarapulaw.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/41866478842.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/xumatux.pdfIn PDF document text
    • http://star-transform-moscow.ru/uimg/files/sewetepuwekidakezedesu.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614603ce0d0ff---bedal.pdfIn PDF document text
    • http://quetthe.com/upload/files/tutanosavivenipanuruso.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/38581129503.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/29866869401.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210908113832.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f495099c4---14941652227.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/6453522834.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/7p4sog81suq3dkeglaclvdc1nl/24168550660.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/72394835537.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/89929220496.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/zewuvadamova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=sweet+home+3d+house+plansPDF 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_off0000dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 10896 bytes
SHA-256: 30e5001255a50f4a3fdfd542ff303f716c76da4d895597333a694d5fd947ac88
font_01_sfnt_off0000f60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60F 18016 bytes
SHA-256: 7da8bac3f2d1732012cf472a26d050630fd880161257b63d5697672916bab1c4
font_02_sfnt_off00012448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12448 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1