Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b59b02d0b348d8…

MALICIOUS

PDF

72.6 KB Created: 2021-09-05 01:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3ba3c16cf86455d1087d8ebc4e78cf7d SHA-1: 06e083dd895a64e708423c0d1b9c81abcb4a8f55 SHA-256: 70b59b02d0b348d86105644933a8ef6587da209f0157fd71f8e2d8186bb91510
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=hebrew+bible+torah+pdf PDF link annotation
    • https://gadd-asso.org/userfiles/file/78850941041.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/23239103576.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/51bd4268f46e9eccfda51abb02fa9ef3/gatawulomi.pdfIn PDF document text
    • https://wmu24.ru/media/file/84978473256.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4363bbea43---66098759064.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///83288322293.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ba7d3ecd5---3991876982.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/42903939343.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/rutulubesazapexadatinedo.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/7182355995.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/biptc5aq00b4ein68nkdairk97/57231309356.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/tetibekawowumop.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160db43fe4e555---xelekorumadodepijew.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c71d9770d55---zafowajipaminusuteguwari.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/844da63b5b782f6042dea92c71ff1eec/tafipavobukejika.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/dokuxinefezebuzuka.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/3f7ae2bcc6242a9ce35f674dc598d439/tozugizubi.pdfIn PDF document text
    • https://praktijk-fix.nl/userfiles/image/file/tomofa.pdfIn PDF document text
    • https://unosms.us/userfiles/file/wudiber.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/navesunolali.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/butela.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/81953084368.pdfIn PDF document text
    • http://dpnovelty.com/upload/files/laxojute.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB965 10540 bytes
SHA-256: c4c1187709e34321e26c7236ca45ab1920532d5849509512a5b58532ba13c384
font_01_sfnt_off0000d143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD143 16980 bytes
SHA-256: d374f783574dc239e901e62961b1a2f60acc55109ccabe30f5e0d0ac4cb87d78
font_02_sfnt_off0000fd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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