Malicious PDF — malware analysis report

Static analysis result for SHA-256 f969d1d4effaf154…

MALICIOUS

PDF

86.3 KB Created: 2021-09-07 04:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ccbec2f2c49bf966f60fa2e540bd50ff SHA-1: a27599c0c10cad14d7debb8ac1d53e0c0ee7f9c2 SHA-256: f969d1d4effaf154e6dd3c2c4d12b9752003ff2380c217403e4b208621a828b0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to disguise malicious redirects. The presence of numerous unknown URLs indicates a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/c0df65bf5312736fc8e0df95a15f3db4/15650190897.pdf In PDF document text
    • https://aquafilling.com/userfiles/file/wapekokamigalas.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/sagudilugovedixefasitusuj.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/98886744956.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/1358978484.pdfIn PDF document text
    • http://slp61.com/clients/e/e2/e296dcecfd7d10ffef0cc83fef253c72/File/45612676358.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/tulebe.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/pukot.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3430f9c018---57092662715.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/7b870fac203f1bc9ea340a51a2547ef5/83652624292.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/99e2ed0a46f42a867e697cc76ba6525d/28078079984.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/20921059111.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/wijijiweminorolimebesu.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/vhqs3b2vdc0bf3tiu3dnud9lk2/36179960574.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/27503d4a3d41d370ff1153219cd3561a/23491998163.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/bafip.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/0e5729cd3f5035d5e5ec3b5878deada3/xigikopusazu.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/30871205024.pdfIn PDF document text
    • http://gloucesterclassof81.com/clients/23558/File/lafoxux.pdfIn PDF document text
    • https://htddienstverlening.nl/userfiles/file/pewibo.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021511636238618.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/magifojuwapezasuzo.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/pgcomeo9q0vohv2246l3239qr1/tuxanibobudude.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/gixaso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=brc+food+safety+manual+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE794 19664 bytes
SHA-256: 15501c6c0707c493c72894cdcd7c0160edf55e5554c474d733d2d7bfadc5cc60
font_01_sfnt_off00011959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11959 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13170 10956 bytes
SHA-256: 0ec2d1690b7785421c6935f8fb95e262bb0c500dd4015c55d79e3aa569f11cb0

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