Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb4648f68adaed01…

MALICIOUS

PDF

95.3 KB Created: 2021-09-03 06:01:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 341ac7fb38d1d3d19cf36f352ab3a8bc SHA-1: 414f49f0d8cbc992e7f46f28d80f5016635c7554 SHA-256: eb4648f68adaed01ff388370d7b0dd0cbd1fc074b083f2f20f19126e300c4fd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are typical of malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

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://drafthe.ru/uplcv?utm_term=generos+literarios+de+la+edad+media+pdf PDF link annotation
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5aaf05c1f---xiwamaxuva.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/25639064710.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/69s8808ttv1dtvh70pjlrn86bt/kivivop.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/96449819967.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607585e423a19---36946711297.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/93603ab7e6d8309c772cf95c68811355/rosevovewikefunaxuw.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/pagitatilozugopopike.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/qa3co00kqildovjarahhmumald/fudalomazokozubijuk.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/nidigosozabixedikopu.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/kokoreseba.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7962fa7326---wejowufaf.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/luviz.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/38806104565.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/manewilemutamarotaw.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/voguxone.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16078db265a103---3581849588.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/mivobufekimusonizu.pdfIn PDF document text
    • https://robertbah.si/files/file/lebewilipiboneregulepe.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/kejuvajizobudodozakodip.pdfIn PDF document text
    • https://chp-travel.ir/data/file/48050546256.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/dutiwo.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b0e59ff3c---65959042065.pdfIn PDF document text
    • http://haphadoor.com/upload/files/nutujebapoxa.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/81661979834.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/luzefajazuwu.pdfIn PDF document text
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/57128630065.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3db83ea83---42561236588.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_off00010b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B31 19592 bytes
SHA-256: 59fc56de18a7935565f4437f05505499b20242426c63e43d917feaf92a7d71bf
font_01_sfnt_off00013cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000154de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154DE 10700 bytes
SHA-256: d5bda9f0091bccb9cdef8d50d1c67a95560815bbd6f4cf56e9f65193b296e862

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