Malicious PDF — malware analysis report

Static analysis result for SHA-256 158ff38767cef5e1…

MALICIOUS

PDF

69.3 KB Created: 2021-09-16 10:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e0e24a9a2ae33c9bd6f9d81e3eede399 SHA-1: e32b8af64e6b3ea056cd2c3005c57337ae435a6d SHA-256: 158ff38767cef5e1782c0ff65e794cb0d905c328379d7335e3fab0d8442e5d10
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external URIs, many hosted on compromised or disposable domains, suggests it functions as a link farm. These links likely lead to phishing sites or further malware downloads, aiming to deceive users into clicking through potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://allytemp.ru/uplcv?utm_term=fortnite+season+3+all+skins PDF link annotation
    • http://scandirent-new.ru/uploads/assets/file/86890025828.pdfIn PDF document text
    • https://iringmalaysia.com/ckfinder/userfiles/files/xunasoxusezasolejef.pdfIn PDF document text
    • http://micdelhi.in/userfiles/file/27403204492.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/92617530258.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f89e9d4e41---japolidulilevarekupoga.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/pusuvasawufalosin.pdfIn PDF document text
    • http://st-johnson.com/Uploadfiles/files/ritos.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210909005048.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/jabeluwu.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/30196972575.pdfIn PDF document text
    • http://ping-property.com/user_img/files/21562643047.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/78014496997.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412682c509a---wojapiwitojovozigivib.pdfIn PDF document text
    • https://mannoorpally.com/uploads/file/60037823068.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/jusogejivepalasusonane.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/dokevasirixetedosu.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/2e94416c80495d5f0591dafb00838e9f/zefumopiri.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/17819347663.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/4018614071.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/jolavareguxem.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/fekemi.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/9424819082.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/gegezopora.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_off0000b15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB15F 15916 bytes
SHA-256: 09364bf0867463707ccc61eb876458ef780bf7c43de81d6dbe86d337b2193abc
font_01_sfnt_off0000d896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD896 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 10344 bytes
SHA-256: e66e34982953a288c8db744ccfc57de907b7fa69d329c79b1f7c9d445aa9a86d

Open this report in the interactive analyzer, or submit your own file for analysis.