Malicious PDF — malware analysis report

Static analysis result for SHA-256 674f3756523555a9…

MALICIOUS

PDF

84.9 KB Created: 2021-07-02 08:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5835aecf97f24d0c39cdf2f407278223 SHA-1: 00c22144860c3083843f4890f840848637c1b36a SHA-256: 674f3756523555a92d94fb52ed0e5c8df1af303886d6e5cfd7f3b7ee9e1d41e9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://allytemp.ru/uplcv?utm_term=scales+and+chords+piano+pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d912431cab9---49074407588.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b81ac18eec2---korabakavivusobabesidolo.pdf
    • http://cedule-plachty.cz/files/file/zifuro.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606dd069b25aa---masepawadivujikes.pdf
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/vjln9cspu1tub3ee5n7uuf2an1/gafaxomujeguzuwenegobej.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080e8c85a945---44545659481.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4484d16022---88250789031.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095f81d1727f---xojid.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c719c22e5a3d075b3b8a341132a3fc84/83118435711.pdf
    • http://diamond6ranch.com/userfiles/file/vivilaforixifusazetufi.pdf
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0625/834d3ebcea5cdcd63237f9f7b5728114.pdf
    • https://fnb-concepts.com/images/uploads/files/29957387411.pdf
    • http://provia-events.de/pics/fotos/1/file/29180395178.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c888210036d---golixiluvovurijux.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca48f79216---20273481296.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16076343cdcd12---7591597101.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/70984a9439320dc13f0cf03272ffa2e0/9029666243.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/f048222c8bf2daf6701cf0efc8c0b813/24323877263.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e1090ea9a---tumugewanex.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16072052518644---nibutipada.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/leb9ecuqvgqn6tkohopjbijg1v/berilutufifejepo.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609459982d532---85265972598.pdf
    • 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_off0000e747.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE747 16792 bytes
font_01_sfnt_off0000ff59.bin
d20740bc82a631ca19e378582274b53fc03f90b41695d1f95a1c895d867c2ae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF59 17544 bytes
font_02_sfnt_off00012cc3.bin
b14492ed54fd254d458ef1741d97733a12a9d918aabee77d5ef0b8cd24194036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC3 10696 bytes

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