Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b9ef78f3324e42…

MALICIOUS

PDF

87.6 KB Created: 2021-06-29 08:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fe7bc778ddb7d20cc45447cc7a037fcf SHA-1: 900b339baf2a36ce21890fa2cd32a856c9ea7d79 SHA-256: f2b9ef78f3324e42eb6f3a1ba093285328bebcd23d2b0f7ecf838306b55723b5
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 a machine learning classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. It contains a link farm pointing to multiple websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary function appears to be redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.lugashotel.com/data/editorfile/muwakila.pdf In PDF document text
    • https://synodradomski.pl/userfiles/file/gisalawodorarajutevunonu.pdfIn PDF document text
    • http://dges.in/userfiles/file/bovulatuguzabo.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/poxafupanajitukaxiguxefib.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/pujodixusokusib.pdfIn PDF document text
    • http://menafundinfo.com/userfiles/file/87979875699.pdfIn PDF document text
    • https://bauarch.bg/files/28061138287.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/24934562403.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c62e1e5bf39---27681340009.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae2cf1d88f---zadizelejarifiv.pdfIn PDF document text
    • https://nadamasristorante.it/file/mobizugusaxamewakira.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606edfb81196e---64657503521.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/91299225413.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608056720a8dc---42698927188.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac96afa0c---44140623117.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/15281912072.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/63845965547.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/fllsuc4r3053pq6kd8adv5td85/36084970537.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/tozamanoxituga.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/1u9lip6qgarnleqfmp1mogob47/85837103299.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/4401395127.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16212544898149.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/raratovub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=if+this+were+or+if+this+wasPDF 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_off0000ead9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD9 21548 bytes
SHA-256: 66811f0890d11feaaa72753c5488c4e00a45e6f7d21047a9d8664b06e7ef2dc7
font_01_sfnt_off00012020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12020 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13837 10196 bytes
SHA-256: e6cf4c6e5de814dc36e97d61c5f3722f96590326b145fa1c775a31e9d0a48ec2

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