Malicious PDF — malware analysis report

Static analysis result for SHA-256 32864d7a5bbe353a…

MALICIOUS

PDF

87.7 KB Created: 2021-08-16 18:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f431e62837bb6dc60c82646ef7494919 SHA-1: 60e2b5cd69028d84c9e62fb8ffa8c4b00f9f0116 SHA-256: 32864d7a5bbe353aff098a3a3e41fef42be96f31654030bd7e3580cd52451f0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lure users to external sites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://garglob.ru/uplcv?utm_term=miracle+box+crack+2.27+a+free+download+zip PDF link annotation
    • https://taxforce.nl/userfiles/files/megogajenekifurive.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/d7l8155adqco4349o2204o0ei6/45975444658.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c807e278e---puvodalabuxagop.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/donokofitifup.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/fe3452c8274565fbb3335b1045f1bad7/gusosedewelonitisedagus.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/2977137903.pdfIn PDF document text
    • https://jin-ji.com/upload/files/migitafug.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/31690369968.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/or9p35hilbn9migqsp37o4tu57/sirupul.pdfIn PDF document text
    • https://subarini.ro/mm/file/tuvoliba.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/ea72880f6fa28bf3efadf37d39fd774e/xafikiduterabenedexete.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/103c0f9e13459c1acc1698f6ffec3bb0/25857928658.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/15piul2b24vk7u9n2rhodqjkbh/72960076737.pdfIn PDF document text
    • http://peetersinstallatietechniek.nl/upload/files/48419715478.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcac2c59fa---numejuwulub.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/1707279894ca06845b499f56027602c5/47725058227.pdfIn PDF document text
    • https://signika.pl/Upload/file/zugigarexojul.pdfIn PDF document text
    • http://vonschickenconcord.com/uploads/files/wibosubofugotexofu.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/28457718907.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/bf946b7bcba34883430cf2b05d99f7c3/wagekepifonigimuzafuweju.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/49360283181.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/bd43d851bde6f6a7aeed8781543017b2/81748308284.pdfIn PDF document text
    • http://pritchardreunion.com/clients/81409/File/dijopokefawoj.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/2d8fa5ac1eaa5515f4c26b0def1349a5/xisanopiviz.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e09531e3d8d---46858380257.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD992 17728 bytes
SHA-256: 41cf0077abc8c78c264123c3d8469fb449371b0f16d2ee96e8207bb9e9df70c7
font_01_sfnt_off00010886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10886 16304 bytes
SHA-256: 72b6d5534888ecec27fd68dccf88827b5fbc3510db23809d90398b76a33fedee
font_02_sfnt_off00011e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13691 11056 bytes
SHA-256: 204c6bce51931460986ff5fa2c52c0c1e84b17a6952f25be2396d4b03fe344ba

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