Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a130ed3f8cdd2c…

MALICIOUS

PDF

77.1 KB Created: 2021-09-15 15:11:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 634fc7b9710ad936b328c27d060f1640 SHA-1: 51db70db0f38b96a6e0545f0182b302c90466308 SHA-256: 07a130ed3f8cdd2c0c8f00db3c55c8b4e610a380a39f18f03c6e600657d3e864
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and numerous URLs pointing to compromised or disposable hosting. The heuristics indicate a link farm designed to redirect users, with ClamAV and ML classifiers strongly flagging it as malicious. The embedded JavaScript likely facilitates the redirection or further payload delivery, contributing to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://laborke.ru/uplcv?utm_term=granny+gta+mod+apk PDF link annotation
    • https://sayurhijau.com/contents/files/lilixipasukatogir.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a8191e63918e12cf802878cf14b97289/tudolezagaxubaxirigavo.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/zazetelifazeliwiramob.pdfIn PDF document text
    • https://minipowerpack.net/upload/files/dizavab.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/44566348808.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/3226164263fb6e377b98ecffbdaad8a6/xelujunesirijisom.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/mawupalavutidak.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/xedupaketoxosoronizojo.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/fixef.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/2793278372.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/zovalojudizujunivegutan.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/19971341625.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/88690609483.pdfIn PDF document text
    • http://ourconn.com/userfiles/file/202109020053076315.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090712194873499.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/xipujagemunakixubef.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614130d7b0506---gibekesuxujozudive.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/gisureladapaxes.pdfIn PDF document text
    • http://jeansresource.com/js/ckfinder/userfiles/files/64417005166.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16136c5445b2fb---bezozuxozusamiros.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/vurepawubisokadalor.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/lefekivududevo.pdfIn PDF document text
    • http://chpcentre.com/files/file/87938847978.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/nilojapo.pdfIn PDF document text
    • https://leganordavigliana.com/uploads/file/85228331113.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_off0000c63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 10544 bytes
SHA-256: e726c1f4b391a8646b042db8ddcd227eadb7c3a091c9f80a4fbb5defec5386de
font_02_sfnt_off0000f627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF627 19200 bytes
SHA-256: 193eb5f46c7c883d7caaf4345d64dd94bfdd92abd8518a45515bdd29a0510c36

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