Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ee41a163cca29f…

MALICIOUS

PDF

75.4 KB Created: 2021-08-28 06:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 98c717eae0f774b298bbf23e03c3d7a2 SHA-1: cf3754b4a3e4cae55fe28fdd5cdbd3481afdd394 SHA-256: 74ee41a163cca29fff916368c7725ca206b3eca127669acd49eef833a0ec1122
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to lure users through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079a7d8e1966---61797133044.pdf In PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c93dff2c15.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfed42f831---11502573943.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095ab3113d8c---70541342012.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/b8d91e24df314c8ecbe99437e1da3a47/62789049445.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/vawipifi.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a517f72e7f2---33912979292.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/44803263101.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/67720705825.pdfIn PDF document text
    • https://alohasafaris.com/files/63270207220.pdfIn PDF document text
    • http://quranday.org/userfiles/file/perogukanudafibar.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/lufuwunugivutuj.pdfIn PDF document text
    • http://salt17.com/userfiles/files/31030891701.pdfIn PDF document text
    • https://autoparkalbanese.it/file/vojenifuk.pdfIn PDF document text
    • http://yalcinsezer.com/upload/ckfinder/files/39034330656.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611027c4ea53c---wejubinilonemudekamurinib.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/vedomamizijofexo.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/45933026139.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/b52da24dbd20f00333d512cb62fc329b/43562798513.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/c37b76f6aaa907f8281516823708baf4/bawefemifawezolinafena.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c437a52b4c3---fepogosiziza.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/54455340644.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/62045151225.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+spell+drink+in+spanishPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC193 17740 bytes
SHA-256: 6214b5e6bb3ae3bb3ce5d93aa3932fa7e760e2d8d42bb3fb75120d809e8db218
font_01_sfnt_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AA 10656 bytes
SHA-256: 0fd89db8d3a83b6694e9652e304f377171332780c78914cae51bd235657fe9a0

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