Malicious PDF — malware analysis report

Static analysis result for SHA-256 60af9400bc081d83…

MALICIOUS

PDF

73.9 KB Created: 2021-07-20 22:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 17806099dc2d6c3a5c414b921b9dd813 SHA-1: 3760d9cc688a7a8ad33a0df714dfbcd2513cc3d7 SHA-256: 60af9400bc081d834fb3466709cef4e3be38930a73deeecb84c946658b76ea49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to malicious sites. No scripts were extracted, but the structure and URL patterns strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 http://asiadomainstore.com/userfiles/file/8353700187.pdf In PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/tisum.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/58ee38373a2705b4ec013125f4ee2002/9002795337.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/16397425598.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/c6fe6ad4683d42fffe79c0548974160e/53438720943.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160819eec295e0---49860236920.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/72858be4d0ac998dc41bcff9532f00ec/15693743734.pdfIn PDF document text
    • https://okazionche.com/files/22333042184.pdfIn PDF document text
    • http://aquatherm-graz.at/files/visofasojafodozojatunix.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/ebb6b2e55d77a78c9d5ad81b60cda851/15157368270.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/fc46dbf5ef0093df7e147d428ef8c051/vojovedimew.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/bamofinifakazuxuwuv.pdfIn PDF document text
    • http://chhsclassof64.com/clients/b/b2/b21d6454c74b38f294a67049e63db9d7/File/natoworivixa.pdfIn PDF document text
    • http://edgecs.net/documents/58277157559.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/d0151441ae7d7f7ad301112217db5c77/58730992841.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e19fe728ad---94852734466.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608b410f9b21d---soruzidiponaruvugeroxanir.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0ad4ea353---47825907596.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/1b1f4cbbe7b6ed6962a8b3d0818ae3f0/69604374111.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/9ngrggflo86mdh7spm1ukf2ff2/66536479487.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/xireninimasowodumotigus.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8abfc7147a71b506dc52d42a12b9122d/gebekenu.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/13337192888.pdfIn PDF document text
    • http://technocom.pl/editor/file/towexuxinerepegen.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/zexasawovoxuniwun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=why+0+is+even+numberPDF 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_off0000c0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DB 10480 bytes
SHA-256: dfee55d0443a6713a7a71865b80cae67fcce55fae560ceb78c127bdd799f9c47
font_01_sfnt_off0000d880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD880 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF092 15736 bytes
SHA-256: eb4a861a019dbb105d1778c2f8ef8af208c8c2e2d050b604b651609139fc72c1

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