Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5913417bb0f5c7…

MALICIOUS

PDF

83.5 KB Created: 2021-08-24 19:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 32d4048627c3d9f28e7e47e2b48a403d SHA-1: e3ff80958da0fbb5650888e7ac49fb59fd9ae88e SHA-256: 0e5913417bb0f5c727198771bc3cf0d354acf58b5aba72a4e1199b12829d62f6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Multiple heuristics identified external URI links, including one pointing to a raw IP address and others hosted on compromised WordPress sites, suggesting a redirection or download mechanism. The presence of numerous links, some with UTM parameters, points towards a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://garglob.ru/uplcv?utm_term=revise+and+resubmit PDF link annotation
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/34q3pcp2o3m9rp7t58bque3sp2/dedukoxerolavolelawejar.pdfIn PDF document text
    • https://baptistfriends.org/media/97493092552.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/ib54toffsfmah06kbo7fmdqb3p/veberamijeruwawizololezat.pdfIn PDF document text
    • http://bakefruit.com/uploads//files/202108100113121296.pdfIn PDF document text
    • http://clinicoral.com/img/userfiles/files/badikulilupidafanup.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///72931919711.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/79817177597.pdfIn PDF document text
    • https://cristalensi.com/public/File/nijojebom.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/28305472942.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16091bbb4e4116---luxubovibumekeko.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/xofuwizin.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/62b1df46476469d4ec3f54c351fec71c/40317215439.pdfIn PDF document text
    • https://maintogelonline2.com/contents//files/62849748872.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/76777400518.pdfIn PDF document text
    • http://quocteanviet.com/img-chamthi/files/rolivajevozuper.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/c9c2c21f77f7181ae1848250b46b7e0c/lukozifalavenogid.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d2074568c47---7924665962.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd8c7cb830c---13309282344.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/2nnk0bt38su0ikjnh6i1ceb0rq/wutivevizox.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611a81cd45278---watidabuzumal.pdfIn PDF document text
    • https://cecprint.com/images/file/duzotonalasivexurowufan.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/xofelizulolosemame.pdfPDF link annotation
    • https://yukkumpulgroup2.com/contents//files/xuwunejexilepiwu.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/10197975797.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081717e9682b---bekonopokovoxo.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/waguturipajevekorunobu.pdfIn PDF document text
    • http://ustunongel.com/image/files/fupakal.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_off0000e295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE295 10592 bytes
SHA-256: 74df0b82eb6ff8e1e983e7d08dcf6865951659c988e7a618d514336fb10889bf
font_01_sfnt_off0000fac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112DB 17064 bytes
SHA-256: 2bc5074492afff2d381eb0d060c64f1a0f49c2ce1e5ee08288d30e20c008a34e

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