Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c03d8501cd8c4b…

MALICIOUS

PDF

93.9 KB Created: 2021-06-29 05:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6338608caf12704a039b5c6cff1f2278 SHA-1: 12ff0a32dcbfbeb6e007a5210a5befb2873ea5b5 SHA-256: 74c03d8501cd8c4b4a0b5d073262d195e8263c26eb0f03805b0412f65929b229
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to potentially compromised WordPress sites or disposable hosting. The document body is heavily obfuscated and unreadable, suggesting it is not intended for direct user interaction but rather to host links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/bda055a09f55f88ddd78ef2b73f9f635/12787519017.pdf In PDF document text
    • http://jorkurojus.com/userfiles/file/zufuxilojoginop.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b84c5a5488c---42533986657.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/reludijadopapiter.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/70427825030.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/tiwixuw.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce15b7b84e8---jegavanalukuvuje.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/454c9caa48e99ec6d6ae04f36bc2343b/padafipojagenurewiveli.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/73267583660.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/831f1fd916305d79ee3b422b17a877a6/27415379711.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/nui406cso3rmbr9dvvnfe715g2/37272271744.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/pudizonovidixilerisos.pdfIn PDF document text
    • http://edwardnugent.com/userfiles/files/bazavedizaki.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7f214f67b---68973117600.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/rilofagijabiv.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607367f16030b---nolopekajebipowov.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b7daaf413---50415255430.pdfIn PDF document text
    • https://citytrafik.nu/images/file/96076652022.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/kumixe.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6767a9462---72208501903.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/58065942064.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/m4u5tqlj5s44nt0a2p3ra5b30v/fusipodoxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=manoeuvre+meaning+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC68 3324 bytes
SHA-256: 75f50a19b98e582755a9f6fca57b70a09b76cd27bd5c7983aa43fb9dccafc737
font_01_sfnt_off0000ea03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA03 22292 bytes
SHA-256: ae0632e4326ab7a305ce59e4b7663b47864a28cd45efc197534195e6492c3507
font_02_sfnt_off000121c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C9 10616 bytes
SHA-256: e3c404dd1fedc41f5aafc7a551ac105e7df19f0707c8beca70951131a6a4d74d
font_03_sfnt_off000139cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139CC 16644 bytes
SHA-256: a81483f1c4074c812cade4891bcf45d5c807395353dcbe625a90d0770cff4eb6
font_04_sfnt_off00015170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15170 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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