Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3fa50497b182574…

MALICIOUS

PDF

80.3 KB Created: 2021-08-15 22:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d9707a590360c1341d031f7117e1b89 SHA-1: eca1860bc8948df8adb71ee76eca9df7e8632910 SHA-256: c3fa50497b182574a8cc23291194459342380427bc802647bf535dfa94ac8763
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute traffic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or directing users to malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://rockeit.com/userfiles/file/gaboviwifezavevili.pdf
    • http://caryhigh1987.com/clients/41333/File/17707291106.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608016eb0f80c---jasavurifanomewezegusu.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/sekoko.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/genifijekufebaso.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ce7fa0117---bipinigiwutifi.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608440d4cbe12---femadodugozebobiwugewoz.pdf
    • https://wendi101.com/userfiles/file/64553734744.pdf
    • https://fullprotec.com/ckfinder/userfiles/files/dojani.pdf
    • http://sys-svinding.dk/userfiles/file/rapakaxudovatiw.pdf
    • https://bangprice.com/bangprice.com/beta/cms_image/file/5321262760.pdf
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/kupetaxelezevogemo.pdf
    • http://moestuinwebshop.nl/userfiles/file/pusapubaj.pdf
    • http://ecoevopublisher.com/files/upfiles/file/renaradumejovazafexaj.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ae941302b---jilinakosot.pdf
    • https://autopratichesas.it/file/pivijemonerun.pdf
    • http://augsburger-dartliga.de/uploads/file/77997700527.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/vu3q8amidkm43ks44n15e0dgq4/junotifev.pdf
    • http://gioiacompany.net/images/upload/file/57678931875.pdf
    • http://azseal.net/uploads/userfiles/file/borepegopazazitika.pdf
    • http://cesishotel.lv/res/wysiwyg/file/62014856954.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16097dc1743941---72867307191.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=enacfire+e18+earbuds+manual
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3ff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FF 16792 bytes
font_01_sfnt_off0000ec16.bin
6e788ece999d995c68c40177d8f7cb73bedf25c9da62938ab86fabb9e58da096
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC16 10904 bytes
font_02_sfnt_off00010549.bin
fc1554ab645dc7d51c3b40aea416a5214a0371e18d817ebb9eeb1fbcf8c2a29a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10549 18040 bytes