Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee2d9822ab0ad2c…

MALICIOUS

PDF

78.9 KB Created: 2021-09-17 15:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce067308390af5a0206ddf5e053f50da SHA-1: 9b0adf1bb95b1c106bf1204cbfcfa067b517a457 SHA-256: 7ee2d9822ab0ad2c1bef15b8432fdeac8aed8e9ac187c124605526e15eb6fac7
156 Risk Score

Malware Insights

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

The sample was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://oniceh.ru/uplcv?utm_term=convert+100+to+hexadecimal
    • http://indianapit.thriftstorewebsites.net/flash/indianapit.thriftstorewebsites.net/file/dilix.pdf
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/juzekusek.pdf
    • http://baldonimarcostudio.eu/userfiles/files/41469051432.pdf
    • http://pcccmiennam.com/media/ftp/file/43254490764.pdf
    • http://krupongs.com/images/file/vetedojomavej.pdf
    • http://dedanskecasinoer.dk/userfiles/file/xakijiforasime.pdf
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/misatutojupelewofawo.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143af3f0507c---wepiluworu.pdf
    • https://matharu.ae/userfiles/file/fejepivigusus.pdf
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/d66kspeb3e7b8vgp1em023gr3s/magufubiwekopek.pdf
    • http://e-motyle.natura2000.pl/imgturysta/files/19070220599.pdf
    • http://rockpapersun.com/upload_mce_image/file/25421567929.pdf
    • http://xecuoihuyhoang.com/uploads/userfiles/file/dilemiv.pdf
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/ledivebepoki.pdf
    • https://buonoantonio.it/userfiles/file/pigugi.pdf
    • http://coyada.com/up_images/up_images/91824448145.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/tahc01vt65rpheco7cd29377r5/zejixafesejamiradafof.pdf
    • http://cofetariafraguta.ro/UserFiles/file/kokujezopoz.pdf
    • https://aayams.com/userfiles/file/padurofatugiga.pdf
    • https://sailstudy.in/ckfinder/userfiles/files/gavumubobafejemu.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c967027ccd---betasuwupabezu.pdf
    • 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_off0000cef0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF0 16792 bytes
font_01_sfnt_off0000e707.bin
50a2787301e2490d1988d10b5ea27eed97c9c210e73f0e441a4715adf412f5ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE707 10840 bytes
font_02_sfnt_off0000ffeb.bin
f801846a473ad3f7e7e2fdcdd9bb5feb7ee2c52237fc7fe5eb6d2d8b9f35694e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEB 17920 bytes

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