Malicious PDF — malware analysis report

Static analysis result for SHA-256 510162f56638de99…

MALICIOUS

PDF

84.5 KB Created: 2021-08-02 19:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 97f7fb3dbd8de14119b50a10c0ebc0eb SHA-1: 704668965f0a775f6ad9f83662e3f92aa007cac6 SHA-256: 510162f56638de99ffd32714ea752ccdb920c33292e3b314242289bd41f9dabf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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=manpower+timesheet+template PDF link annotation
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945b8f595bb---pabobawuvomozujaboguw.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/gapabedevopanu.pdfIn PDF document text
    • http://tcihk.com/userfiles/mituzejifabasif.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd7ed4183ad---70503469492.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/litemabibaduwitefumuwubu.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/91217451699.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/pozoxutidegutog.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3acd0adcc---82704080867.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/mobol.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/kelonidagawavo.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160811014b9da0---rizuz.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/povilolepowopogigeri.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/asmh5j0ldtg34860b5lf255us5/zutilofomatipeludu.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/barujijir.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/d5slp18u7oioolspa7unrb9ls4/63094177872.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/lodowopujuvirin.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/44826516356.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b632d702bec---pepumitusakelusani.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/4bb1946a08ae6ee1b68eae797565926f/gowagofikiki.pdfIn PDF document text
    • http://aimic.com/userfiles/file/seleva.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/janizafomejusemisubake.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/2049912531.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/429b796ace2af0b3be542044c2ee83d3/fefuxajufamepige.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/pigipozone.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_off0000e8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10105 10596 bytes
SHA-256: e06b9beddf00d42208004b4b2fa5b3efa00e2a43d4f06fb7a261cefd2d8f501b
font_02_sfnt_off0001190f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190F 16524 bytes
SHA-256: 265b5f57767e16269f5341629cb23809b8249b0aed9f82a620f098a1eb99155c

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