Malicious PDF — malware analysis report

Static analysis result for SHA-256 209238809380b920…

MALICIOUS

PDF

98.7 KB Created: 2021-07-09 13:30:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 49837beeaa05e6c7d6d15c9a66811124 SHA-1: 9a1286c5274d749d37551c8339c318bec4ed1836 SHA-256: 209238809380b920276b06a6931d3ed01efc7f58ff909f3b3decd188f2ee423b
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. Static analysis revealed numerous URLs pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates the presence of commands within the document text, likely intended to execute malicious actions or download further payloads.

Machine Learning

  • Nyx PDF Classifier clean score 0.1140

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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=another+word+for+unyielding PDF link annotation
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/bovt2mm2t19r2kahp8e60i9mli/6360356540.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/54969611001.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/78q181m19a3fvhops9q7kitpcp/xebadez.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607653bc54bfc---27075763980.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160b79e37bd10f---zimisivedagof.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745285dec87---29006375013.pdfIn PDF document text
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/pojeba.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/d4vjaq0ot9ac2tpcurlrualj03/givuwiwazodilofajalix.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/f38fd809ab6a339203042d2c1ec19c57/86487626842.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098b7b455494---12818412152.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/b9c76518b948d24695c267b514b8182f/82967690672.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/89250534359.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/2a3059c9c0ab90d68e363e97f37a7af7/29794142131.pdfIn PDF document text
    • http://jingchengs.com/jingchengs/ckfinder/files/20210630081421.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1608312ebe4209---puluworubawagaseje.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/vevilupisurifinasazu.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606efa263b47d---xadanedalikaxi.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/91359266772.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/33689970536.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/f1b5d7876cff817d9abab794c746f85a/wefotafevivewidivimoxanat.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084e9e99d8dc---muxaresig.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96aab64ac0---fefubajuvivojito.pdfIn PDF document text
    • https://silga.ca/userfiles/file/30671027932.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/p2qa6gutahepc70eghlppbcv33/94937439095.pdfIn PDF document text
    • https://www.hungryalexIn macro / runtime command snippet
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000152c6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x152C6 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_00_sfnt_off0000f5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBB 22536 bytes
SHA-256: e72fe31897e947fcd472f0831bf75c2763b10cd241eb185d3e436f407688ddb7
font_02_sfnt_off0001454c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1454C 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_04_sfnt_off00017068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17068 10584 bytes
SHA-256: f8f5c635a969c15e7ab813d11b85c6c79ff6fa8a8eef1f8a3ce27d15ac7922f8

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