Malicious PDF — malware analysis report

Static analysis result for SHA-256 45cecb447534bfb7…

MALICIOUS

PDF

86.5 KB Created: 2021-07-09 07:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62a409a446f79c0021843b90748cf979 SHA-1: fba8451559423e3c6ea4ab5bddd8f373053def2a SHA-256: 45cecb447534bfb7f18c524d2d345173878f9797302f984add0b30d1262781ac
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised websites or domains associated with link farming. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for SEO manipulation or to lead users to phishing or malware sites. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://askort.pl/Upload/file/xevukekupuza.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/93a48b9d664c5e9bcfa07f217e43b031/88359480991.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70e007c3d0---3588063440.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/ac169d18012356d31392dcd38daeeaf4/fewoxujake.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/26f0c91915428ebfa5a6334db34bd1aa/23466870402.pdf
    • http://tznjl.com/userfiles/files/ruzebu.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acbc0d03b8f---36575731274.pdf
    • https://fnb-concepts.com/images/uploads/files/xatilameruzigafa.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/43381a228dd79f84714fdd6e079ac8dc/malumasonuzevamixalorilar.pdf
    • https://fenixfalt.com/userfiles/file/vunaxo.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a55d1696def---2946187919.pdf
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210520051036.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fd7e385a0bcc14fd8526ec629f339648/vusaselokowatimulemorul.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5e324be0a---98583664229.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/a907e812bd0c965fba33d56ed47e9171/56880331247.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2ff063ebf---67087329507.pdf
    • http://goksirlambinowice.pl/img/upload/files/nifetafufidamazawulora.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/9de2f29acbf43669bf72481692fa0a56/mekusepefifagafixu.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/5f34b97d1c721debf7fcd661fda2ec8f/54280483098.pdf
    • http://jtour.vn/userfiles/file/walofeti.pdf
    • http://scandirent-new.ru/uploads/assets/file/60898095770.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/623c8b210ef49f825f11ba6e3c7cb9fb/rujafakuxaraxegavu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=difference+between+iron+deficiency+anemia+and+megaloblastic+anemia
    • 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_off0000ee41.bin
32b55517b13d6835bf216c83eb8c7b6589715a24b4c4c672bb9a9bfb38083648
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE41 11160 bytes
font_01_sfnt_off00010832.bin
d41afa2d8ed3bde1337ccb0f37e517ab0323133965df25abe653a75f905b8131
pdf-font-stream PDF embedded font (sfnt) at offset 0x10832 16900 bytes
font_02_sfnt_off000133e3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x133E3 16792 bytes