Malicious PDF — malware analysis report

Static analysis result for SHA-256 274ae2c193760f70…

MALICIOUS

PDF

87.7 KB Created: 2021-07-22 04:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 9153583e26414c427b4295750cb78f03 SHA-1: bad02f1b171de8a54a3dd40488d671ed294e7b45 SHA-256: 274ae2c193760f70b48ca0a1ac90d8715441a3da1ecc702defa1d42b6b1eb9b7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://airconbank.com/upload/fckeditor/file/91943904023.pdf In PDF document text
    • http://fujiya-burbank.com/uploads/files/xupelazugowuxaw.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba63c4e9b83---20030708130.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/74258735357.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///wopesakenuliwire.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/misikotagoxidanogogemiz.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/31d46b1c7a99ad99a4f15fe1b94f5ee2/kiwagevego.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/61072416741.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0358af97e---nirepuzugavofekimikomajas.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/754eb6072b547c9ed7f59ebab7fe9f0d/87601881538.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbc3fae18e---20326833437.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/62759431566.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/d11kij2obqd4m93b6krkvo6a9l/44513845020.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a77d2b73aa9---vutikatugabebaxe.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9797eafce---94317515669.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/kajetozisitawotilupan.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/ranumujojawariweveva.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/8992462251.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/5a0ad8d2689dc82615c069c6f0700fc0/pugozafuworolodawatevuvug.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/3618101433.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f28078a7534f61640ec54343fc0b7e8f/domulavorasitubowoz.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/973nv132fasr9dvrfdsa1svvpl/razopekunitoteduz.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/18233783209.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8458d3f57---vasikujeluboladupegiruke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=countable+things+listPDF 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_off0000f38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA0 17352 bytes
SHA-256: 9a330969a8c5bd07a58f27b92cddc5ded3ca2d92bf6171e101cc8d1b98969039
font_02_sfnt_off00013891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13891 10556 bytes
SHA-256: be3726ed4342a0f910f69caf1bb89bb625187f2722b8d40d2b447aa2df8be752

Open this report in the interactive analyzer, or submit your own file for analysis.