Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d1ee003f46a7a8c…

MALICIOUS

PDF

85.3 KB Created: 2021-06-28 03:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 60897a17fd730d98b7ff0654ed42094b SHA-1: 1e234365f2fd6bd2853ce061c3157339de8cbf09 SHA-256: 8d1ee003f46a7a8c5ed7908f1cabb35a70354ce400eea2c6937616f691ef5920
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms. These links likely serve as a link farm to direct users to further malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/e20bcd1669319be8bb4b5a12a7791c13/22709355414.pdf In PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084407a2f062---71080102774.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/22167154275.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/17680074968.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/shkkbsbfabm3f4fnmhg9nsc3td/86606523299.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/44008125394.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/208e53eaa0f0e817f90de0cb45f6a0c5/31172513152.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/poselemapubisela.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/1367bf0ca3c4d1be252aeacf3e280dbf/13140291225.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/b92888298707adbaf53cc46b33cfbbf9/45186697343.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/79626049588.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/19597801431.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/wipejibazo.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/u38ap9ju5q9nnbvnru39l0qq95/57545590573.pdfIn PDF document text
    • https://latework.cz/soubory/fiwazox.pdfIn PDF document text
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/25334868101.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d091fb0619---84636726121.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/dff518b7137b49b862f5b17259921125/40983372712.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090c83de6112---69494101278.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/dujanadoteri.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/45244736986.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/79504348019.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/nopepoxuwosonumekitere.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/39036463034.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=every+good+boy+does+fine+worksheetPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10215 17192 bytes
SHA-256: e971d4cbb94cd3816b886f457b3e3788bbfe517c1d93c83624b67489d35234aa
font_02_sfnt_off00012ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE5 10904 bytes
SHA-256: 79d3a283448cc9d45f85359ccdfc0d3918e1ebc83718412f0980af67dff6f173

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