Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d2c95d6888a52a…

MALICIOUS

PDF

75.3 KB Created: 2021-07-01 17:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 96c03567e113e5b13adeb0ffce9de256 SHA-1: 09064181ab38c18e5d45c7f8b4dd418439aaeec8 SHA-256: c2d2c95d6888a52a4857a627a60e81572cff321fbdac573af1eacb3442a8a4d8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URLs, many of which point to compromised CMS upload directories. This indicates the file is likely a lure to redirect users to malicious sites or download further payloads. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=introduction+to+sociology+giddens+11th+edition+pdf PDF link annotation
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160869b428192f---98747741319.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/590ee8f6d5b66efb05e5744713247b30/zobagi.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/29441702341.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bedb931d79a---57854594152.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4819e2a6d2---mijopixaveret.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/dfe7feb5178ad5444a1498b5c77b287a/jujazesizebuv.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083592f54d8c---95293695557.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608e531d3345f---zidanakufetokaxevix.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079032c33192---98739631188.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/tazijipizodegudokeponono.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/7196105371387510364e3502dd1daea6/57759058042.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/030a8125d331e98ee0d4b69e2af43890/26023991931.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7d58eb88a---rimumuzefexojomufowelolar.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/33228005175.pdfIn PDF document text
    • http://lighthouseofworship.com/clients/44803/File/26651691148.pdfIn PDF document text
    • http://www.520amis.com/upload/files/56123899575.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/gujijirib.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/87651416783.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/3nk4oujr6freq09ftecik2bths/sewoxaras.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/8a6sfttbhgb30u8qkq16j0etoa/87343112192.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/c4038ff6a5829b35d745752c09eb833a/8284097418.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abaae6e9adf---lugufaweza.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b238a48d907---mawegepixulemutevokowotig.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-12/20210512052143181407.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a950ac0c1---mozivawakowujokovowamimi.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_off0000c2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F4 16720 bytes
SHA-256: afcf82bbeddab452765a88d25780522389d26687a6a6aa9123498971720a9c7a
font_01_sfnt_off0000ee78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001068f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068F 10956 bytes
SHA-256: 8873bc33092845acc70631b79506751938fdb9a7af0f6603c0bdb04525d52ef4

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