Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abcbba67b5cc57e…

MALICIOUS

PDF

108.4 KB Created: 2021-07-02 06:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aecd52ca79cd12b678f73ef6f019054b SHA-1: 97e91c846780e3cde6cf31b6590fad42223a206a SHA-256: 7abcbba67b5cc57e7f9c20a90b71916b6915eb22e13586e3e148a1a25e71f09c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and flagged by an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to various compromised WordPress sites and disposable hosting domains, likely to download further malicious content. The presence of advance-fee scam language in the document body further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813c737a9dc---jezijitases.pdf
    • http://europavloeren.nl/siteimages/file/kalelapogone.pdf
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/30326321940.pdf
    • http://jnnycc.org/userfiles/file/wofiromos.pdf
    • http://ibb-online.ru/f/file/52845314233.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/d135853c8c1e8f9056d386b936d5edf1/wawub.pdf
    • https://acgroupenterprise.com/userfiles/file/75045037051.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e771b0ec9---62796083488.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/163299f70fedf0463219e7360296f1fd/waguvina.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cffaf3050---13339888287.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f773ae7bd9---63471633386.pdf
    • https://viettincapital.vn/upload/files/35175086121.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/803fa5d2e88321558ce93e269fa68f49/kamedilonipa.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc51d765da---vuzoxegepixasebisakujewuk.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/94981d9d3a96096719bb755323fac633/bozavizuzopevubekawodoga.pdf
    • https://alamansyria.com/userfiles/file/rexupewisurufotokeve.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/604c2cf1ae9e465f348f4bb4dcc9be28/83568996518.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/0a8ccc05c76cc0f34febebbdd1ddd083/lisuwekinotasamofuvudomup.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608465a3b6be7---6906625258.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d81431c986---26975445025.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072ba494a2ad---21670919786.pdf
    • https://fablab808.com/nbloom/fckuploads/file/wibex.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/d42b9078f6ac8a38a8387c3c65e5634a/37999149498.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a1404d60a95---zewevi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=family+maintenance+policy
    • 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_off00014877.bin
aa815734008b073b8ed9d53a8a2937a3fa5c6c248ab93d144b44e9269e64fb94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14877 17024 bytes
font_01_sfnt_off00017529.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17529 16792 bytes
font_02_sfnt_off00018d40.bin
9518344564f074669d4b71b15e0a6ab0c2826a44e882365a9aae53ec53f83840		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18D40 10360 bytes

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