Malicious PDF — malware analysis report

Static analysis result for SHA-256 152b72917f5d2a05…

MALICIOUS

PDF

88.9 KB Created: 2021-06-11 23:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 62601a71111c9c74db7dfbc12c9e5d44 SHA-1: e667c4cf81120e93c1b9511d0ecb3bfccc802c97 SHA-256: 152b72917f5d2a05697c3d8365f069bbba3ea3b90ef02e99d506b49d19062358
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains. The document body, though heavily obfuscated, appears to be a lure for downloading drivers or software. The presence of multiple PDF_URI and PDF_RANDOM_URL_LINK heuristics, along with a high ML score and ClamAV detection, strongly indicates malicious intent. The links likely lead to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://catamma.ru/uplcv?utm_term=canoscan+lide+25+driver+for+windows+7+64+bit+free+download PDF link annotation
    • http://vinmexindia.com/uploads/zekom.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084b8ed59770---sipetusoxopup.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d27340bff0---kozimimalesuteguziba.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c55f3ca7f---78559949092.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/vj3o83psp4a437vsa7dm8r8nt7/jatijezizimozonelalet.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c1f3499a9---ravuwiwixoves.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/roxuverolelevibinir.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18978a060a---34299735262.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc70d77bfe---82535668035.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a835344b143---jabatemetasanagesetate.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/08c940c74dd0f249094d1a6236275d97/bagebusamasetalekux.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a328ba6de07---99150871200.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/mukudekoxiwudojisivuzi.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c27f556402---niwerujapozisu.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d7ec65c5b---9503496752.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160733373a230c---43077262276.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f41b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF41B 13616 bytes
SHA-256: fafdf63dd4adb36f65eb58c74b2e8eb4c0de6a78cf77064b3d0503838366d5dc
font_00_sfnt_off0000e03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 5792 bytes
SHA-256: aa58ae595142bd06cd4c2748e454dbe783261c1d0264af4f8b1b6b5714cfa83a
font_02_sfnt_off00011a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A06 10672 bytes
SHA-256: be73cdb34da3092a10098b7daba2f5e6dda800ece207e69c4529e68ad0b45997
font_03_sfnt_off00013d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D8D 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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