Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b008a56142dadbe…

MALICIOUS

PDF

94.1 KB Created: 2021-09-16 03:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: e590740891d98afd493b295f89b0ea47 SHA-1: a99dee3547ae0ebcd1149c87c75177b9faa764fc SHA-256: 7b008a56142dadbe4fae2fecfe83686e0d1a21df3bd86dcae93d7fcbbe6d6287
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://synerhu.ru/uplcv?utm_term=fast+and+furious+hobbs+and+shaw+torrent+download PDF link annotation
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65608547018.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/95194676613.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/42219792811.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/161327848488bf---27177401563.pdfIn PDF document text
    • https://go2germany.ru/files/file/43251369140.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/10565012356.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/56747445770.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/87782806279.pdfIn PDF document text
    • https://gestionarival.com/userfiles/file/gufasuvixa.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/97899796285.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/xelevixetekuxalozekumoxi.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/kuvumupoxineluzoruriban.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/jinodaka.pdfIn PDF document text
    • http://iranjobex.com/cache/fck_files/file/sutewonexu.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/68141267169.pdfIn PDF document text
    • http://scpt.it/userfiles/files/tanexen.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/fovulatal.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/72923940126.pdfIn PDF document text
    • https://traicaygiasi.com/Images_upload/files/63043951339.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/rapifabuloliborodedabiral.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/javutotibofe.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/xakolunupadebasek.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/47354204517.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/nibewejepota.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001070b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1D 19316 bytes
SHA-256: 9321dbf20786d9dd80672d72b49f2edb3f06538ce98e693f8faf0261a93b6aa2
font_02_sfnt_off000151bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151BB 10756 bytes
SHA-256: 3e123f5797a2bc4d640438ac5d3fdd4664e492a2c1953e3bf5eb84a586116e4d

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