Malicious PDF — malware analysis report

Static analysis result for SHA-256 675315023005235c…

MALICIOUS

PDF

81.9 KB Created: 2021-09-13 22:35:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c27a3b0d42eafd67b1aec5e83a56a135 SHA-1: e039fa1690ec4b79425944c88e552d677cffc0d4 SHA-256: 675315023005235c05c4c16fb5ab34a78fafb4b9d21a8acbfcf17293074533d8
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript which is a common technique for malicious PDFs to execute actions. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous unknown URLs suggest a link farm intended to manipulate search engine results or lure users to malicious content. The JavaScript likely facilitates the redirection to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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 http://piazzademarini3ge.com/userfiles/files/xuvozumaninena.pdf In PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/35527550309.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/23699874958.pdfIn PDF document text
    • http://leylatoprak.com/userfiles/file/48223000014.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/wuwosulonirudiguvitaraz.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/rorikesetarejumovebujibej.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/61683919153.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/wakevukuriv.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/43800009595.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/97002502574.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/tudab.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/nexafeviwamukogetonuxome.pdfIn PDF document text
    • http://thevale.us/userimages/zalufewevokonomule.pdfIn PDF document text
    • http://kor-ra.ru/UserFiles/file/58107349183.pdfIn PDF document text
    • https://kotypsy.pl/ckfinder/userfiles/files/pinemuwubujefekepifijadof.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/zositudebidizefasenagudo.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/93468722366.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/30344086065.pdfIn PDF document text
    • http://nenorm.com/files/files/20982613486.pdfIn PDF document text
    • https://mackbeks.com/files/file/79129799798.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/84541355928.pdfIn PDF document text
    • http://quaint-house.com/images/blog/file/95951328473.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e736f43eca---5114830029.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/66006814346.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=iron+man+game+download+for+android+mobilePDF link annotation
    • 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_off0000d853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD853 10608 bytes
SHA-256: 1986c4076f9970e95032aad4a188c34a4d9adc0f4a8a2a7fe4519c9920429cbb
font_01_sfnt_off0000f04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001085f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085F 19212 bytes
SHA-256: b8cd2b9e4977896c2b4388032a13d8bb6b14831e1c0c0daa6a1252c604b4f642

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