Malicious PDF — malware analysis report

Static analysis result for SHA-256 74486d4e6caebf13…

MALICIOUS

PDF

76.3 KB Created: 2021-09-25 05:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 916e40359efed20173bab7d72fcae189 SHA-1: 4385e3e7995bdf77e447b478cd9a5f62fe14211c SHA-256: 74486d4e6caebf13d60f75d4357a3e9cfb736ed8fced6a41e215e39c8a78ac24
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous URLs, including those hosted on compromised CMS uploads and disposable hosting, further indicates a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pixomot.ru/uplcv?utm_term=insanity+workout+schedule+pdf PDF link annotation
    • http://hzosm.com/images/upload/File/tawevewetobopaforot.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/55279554344.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/532f648a2b057506dde7de6799d46e4c/rulekofujotozak.pdfIn PDF document text
    • http://robedecreateur.com/img/files/3660533772.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/fumugizuzeneraxojoxofivox.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613021b29b395---rezoropofomezusijuvidavo.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/ranewufajekomisulugomelol.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/melavid.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/85888158509.pdfIn PDF document text
    • https://tenhucchi.com/upload/files/legademodukusebeku.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/30519997817.pdfIn PDF document text
    • https://metrosecuritynepal.com/assets/userfiles/files/95420430016.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614c6fd504132---rupamulodojo.pdfIn PDF document text
    • https://loppisidjupdalen.se/images/uploaded/file/kuvibewumajebexakotizib.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/161361d314ec1f---36974800508.pdfIn PDF document text
    • http://tokyo-sanritsu.com/userfiles/file/23323380374.pdfIn PDF document text
    • https://tomaszbizon.tomaszbizon.pl/web/uploads/files/83573689441.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/44823481118.pdfIn PDF document text
    • https://coil.hk/upload/files/42960777138.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/86531500682.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/67773306270.pdfIn PDF document text
    • https://puntodeplacer.com/userfiles/file/72362226591.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_off0000c2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F0 11060 bytes
SHA-256: 4006f69fee81a803f12b099099d99bcd47c4f0350a6e1f0958af316b161b744b
font_01_sfnt_off0000dcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 18132 bytes
SHA-256: b80f49be31e341b1ff475b9df3e7fa086afa736059d63d353de0535bef4a29ca

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