Malicious PDF — malware analysis report

Static analysis result for SHA-256 90fba60492e422e5…

MALICIOUS

PDF

85.5 KB Created: 2021-06-26 09:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 06190f7909b32f170c6060bb9e493ffd SHA-1: c0696d041f1f7d28f71da4d3f30200d5429ca4f4 SHA-256: 90fba60492e422e584f8d7d6b486ced71375ec0231a8035aa8c48d588a9f6150
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to compromised websites, many of which are hosted on WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The document's structure as a link farm suggests it's designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/7c5d0ab0bb4782bd605a0d19dbc2bea8/46899719349.pdf
    • https://cottingham-group.com/cufiles/files/subuj.pdf
    • https://vietnaminsight.biz/ckfinder/userfiles/files/24448472099.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/9l9l0nbg2sllmlim7bu0tnvnom/sejuvulegekabozofipumexi.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/fa18bbadafbe9743bd6af99250014ce5/xerokinepezugisoko.pdf
    • http://sosonomo.com/ckfinder/userfiles/files/93985181398.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/a99779de2e03fa6a4cc6924671da9c09/62653962428.pdf
    • https://people11people.gr/uploads/File/bejopowukofufur.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/77847fa209c335a7d1c15dff42f131a2/42182231361.pdf
    • https://actorconseil.com/files/file/lebenijedivotul.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c4979d0d716af2a36d7a171cc36358f3/badurizudevovazinobevek.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609877c2e3c32---55949202205.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/fac1e0a983661dbc961e7da845568419/mutij.pdf
    • http://autoshiftbid.com/fckeditor/userfiles/file/37282596937.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c659f84b411---9397874820.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b16a6d1f4d7---dewugenijavik.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6a48bc368---76836956310.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608615d2128be---91948840270.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944de534b81---26127947751.pdf
    • http://steakclubhn.com/campannas/file/87974987398.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080abcae174b---37854042066.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/ced4821cd8162788e99d5b8bc4c1b5bb/56451612.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/f5f1d63df34bbe021a0ae131e1df60d1/balitudigunopopopa.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=pooh+seasons+of+giving
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d285.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD285 16792 bytes
font_01_sfnt_off0000ea9c.bin
5078a925965bd3963d24d3d2677759b1dee1367b6dd2669190a27f8cff085754		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9C 10316 bytes
font_02_sfnt_off000101d4.bin
fb6e63d699d7d6a0e718211d0c0ec5bf72ca9ff7f4f4953d5bee46b583613eb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D4 16744 bytes
font_03_sfnt_off000119ce.bin
b6ff69a7c7667121543326b86b1e5ff2cb62cc63d791986aa7e36c709e46b594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119CE 18724 bytes

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