Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d02fa1642e7e1bd…

MALICIOUS

PDF

81.4 KB Created: 2021-09-12 02:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 3ee2265fd959a7b9d60ee7b6314e04ec SHA-1: 8484ea0c9083acf2351c6720935f418871930674 SHA-256: 0d02fa1642e7e1bd8ad950bdfd39569de9e25f466c3aa38c6fd6b4997eba6285
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on compromised CMS upload directories, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://synerhu.ru/uplcv?utm_term=epic+conquest+mega+mod+apk PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136efc94d60f---dixemekubowibivi.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/lanawovobezorududilaxav.pdfIn PDF document text
    • http://chenruichem.com/upload/files/35264542913.pdfIn PDF document text
    • http://satunatc.ac.th/ckfinder/userfiles/files/tilewiki.pdfIn PDF document text
    • http://volkshilfe-ktn.at/images/content/files/11146874553.pdfIn PDF document text
    • http://kreativitaet-stadlhofer.at/global/images/userfiles/file/ronewetejatibimam.pdfIn PDF document text
    • http://hoachathoanggia.com/userfiles/file/januzuzizixopeminuz.pdfIn PDF document text
    • http://marklaliberte.com/fckupload/file/widaxosa.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/xodoz.pdfIn PDF document text
    • https://nyirfa.hu/uploads/files/dovetobe.pdfIn PDF document text
    • https://halkapsikoloji.com/userfiles/file/78529273643.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9d749c769---gaxibitas.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137bfa32b493---pikuka.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/kedodudegezolomanexon.pdfIn PDF document text
    • http://indianspringhomes.com/userfiles/files/48064664279.pdfIn PDF document text
    • http://eldorautomaticgates.com/UserFiles/file/21545056364.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/84452913010.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/27161646505.pdfIn PDF document text
    • http://pietroquatriniarchitetto.eu/userfiles/files/ratokazeweve.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c646de370c---70707534442.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_off0000d36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD36B 19744 bytes
SHA-256: 38c6c490898182fd63f9a0344ce3733f37890ed306c14aae09206072b17773df
font_01_sfnt_off000106c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 11032 bytes
SHA-256: dc47e902f390a9913ed0bccafe9027ac53ebf27142d5fa203dde9f8e1dbb4eb6
font_02_sfnt_off00011ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1