Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be49073a33fa5b5…

MALICIOUS

PDF

72.0 KB Created: 2021-09-13 18:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7ddd726910a7dea6948fb04abb12394a SHA-1: 30e484e178efc5b004bd4acaf06162e49a3ce50b SHA-256: 3be49073a33fa5b54677e7ced3711a0676fb4c1124da1246f6a734dfb899151c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by a ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting. The presence of a 'download button' lure suggests an attempt to trick users into clicking these links. No scripts were extracted, but the structure and URL patterns are indicative of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lonerangerfanclub.com/ckfinder/userfiles/files/79961770383.pdf In PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/famegunujakutokemeferax.pdfIn PDF document text
    • https://negaratoto.com/contents/files/28219897282.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16137ec64eaf4d---65323653233.pdfIn PDF document text
    • http://ternovykh.ru/content/file/kesoxigo.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/wesapasikodubip.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/74727163475.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/xigisazanejoloxoxop.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161341514474e5---parexarovanavelovepat.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613502bf2ba67---bazekezevawurolepa.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/rorebubegijojifu.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/97548610968.pdfIn PDF document text
    • http://wsm.hk/images/files/tasadisixosubozokepodiku.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/34456648778.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210908081740.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/wibaxudosopaluzanot.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/gokijadadawud.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/33854142840.pdfIn PDF document text
    • http://isvpro.com/custom/files/33369253831.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/jurepupilajuviraropun.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/gozepuzuwawupizefeja.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/nademivuzusimonitot.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/63022090207.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/20417586323.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/49063491369.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=mod+gta+sa+android+no+importPDF 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_off0000b7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E1 16540 bytes
SHA-256: 6d0a107705571f094ea2212e46712a7495edc88a1a1b7543c4a51e5da9639c8a
font_01_sfnt_off0000e262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE262 10552 bytes
SHA-256: 5e203308112d29e64335b7fe6865c12887b224aa0188a44dd97caf9d98e44ca3
font_02_sfnt_off0000fa30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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