Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ef76810455c782…

MALICIOUS

PDF

198.2 KB Created: 2021-09-03 15:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e7cacf1c0ead206b917b50bd0ff59b8f SHA-1: 587c46fc6faaf6b9ac0d38149ce19859ca150848 SHA-256: 24ef76810455c782ab62bf0f10b7ca2d517a5becc80df7287a7b086ab8d18508
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many of which point to compromised WordPress upload directories or other suspicious domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the embedded links and the detection as a phishing trojan indicate a likely intent to deliver a malicious payload or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 5

  • 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.
  • 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://birsamundapark.in/userfiles/files/lugufetiloxifodo.pdf In PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/305c1d178a05458d19490c47770368f4/73056408052.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/sodututogimol.pdfIn PDF document text
    • http://gphs84.com/clients/866382/File/81805789282.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611033c2ef5ab---tinitotagurerobanek.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/95539204493.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/1130252316.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/15510435364.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/fezoz.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878a70dfc25---refajanomu.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/77950613801.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/464a90137bbe759578d5f50794ced25a/47607188341.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/87e1316addd360209d727e484236f72c/46767381639.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/ditezanidupujerajeduguk.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b429cfa6f---jilutu.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/11frkh4nped3u1jcdkvsm06md6/mexasipomutoniratir.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85c0881c25---17848557011.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/80899944403.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093079b62b53---digafugozotonolojo.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/96508602487.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/06a2b4f680df951b15b3f82b533bbc97/98743478374.pdfIn PDF document text
    • https://aaaxxion.info/images/file/perujujafikiwojexowamama.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/vloh2o14iuru9huqj87jual492/61672623238.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/5e6248e4fe102e2927054ea142a6b18d/tedaxikeniwezexuwibi.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/7d17f1144d314587d14ae2b91b6ff86d/20387148871.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=pindyck+microeconomia+pdf+portuguesPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00027d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27D19 16300 bytes
SHA-256: 7b67b9e414ffdbcd80edaec170b6583411c9899112da71b83f6494693782c568
font_01_sfnt_off00029351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29351 27060 bytes
SHA-256: 414021905e5c2a979ef4413a5cb6d8c9a5f6f7e29c0af28cd7fcf8801542797d
font_02_sfnt_off0002d765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D765 11224 bytes
SHA-256: 166874a184cba7f35733a4228bd75bb87ee1edb2720cfccaf21c5f7432ca8211
font_03_sfnt_off0002f183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F183 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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