Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a7d493765f7b74…

MALICIOUS

PDF

87.1 KB Created: 2021-08-19 13:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f83ab2ed9c06d4f279fdf417250de6a5 SHA-1: f908fdd6a5ba5fadb56d72e09b5296960371ebbb SHA-256: 48a7d493765f7b74ebbeeb30bc97b3c610ab33056afefd5f30bf23ac8282a719
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to further malicious content or phishing attempts. The presence of compromised CMS upload links suggests a pattern of leveraging vulnerable websites for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://drafthe.ru/uplcv?utm_term=political+ideology+crash+course+government+and+politics+%2335+worksheet+answers PDF link annotation
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160be620321f89---sexiponar.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/7cbba1eb3946e768cff63c96037d0960/kimelevipugig.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56941538091.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/4d9c102515b3454c90eadddd14a6588a/93725764488.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/v1qdlg7lmitd2p1dtascejt9f5/sowirik.pdfIn PDF document text
    • http://timnhanhonline.net/upload/files/wabatobivoju.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c94d2fba3e7---94040154056.pdfIn PDF document text
    • https://mszukam.pl/dat//file/57846314045.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/273bd8552ecaca0e2bb2ee8f6a9748b9/muras.pdfIn PDF document text
    • https://ltssinternational.com/res/wysiwyg/file/sagabinaviwovivesawojitek.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/zufimugopajikamemusafizo.pdfIn PDF document text
    • http://inncredel.com/uploads/46343260129.pdfIn PDF document text
    • http://quangcaosms.org/media/ftp/file/kesipatajasatosuratuto.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/70111674056.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160a9601044f02---76313989544.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/8a50qrqd8qkeeg375bbo0luf27/xubal.pdfIn PDF document text
    • http://nessium.net/userfiles/file/94421215345.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608e05fcbec1d---mubujefarenekutenas.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/60807159524.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0084ca6c98---73415842672.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/4d670765f62df24ea105cd001ec7d284/29821892643.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/1482d8402465701903c9b1fc1113a26f/55923441696.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/91768645887.pdfIn PDF document text
    • http://galeriejacqueselbaz.com/userfiles/file/xegavokama.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_off0000f055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF055 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001086c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086C 11240 bytes
SHA-256: e8d1159d03b4a2e2eb9bfd09668788601edaaa7d60be336c8f449e99c4cc140e
font_02_sfnt_off0001226c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226C 16652 bytes
SHA-256: aa14d894584a9015aa9139c82ef39042d8be5f66c8160494d3b9779280b49c1a

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