Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c9f0df67ef2dd8…

MALICIOUS

PDF

90.0 KB Created: 2021-07-13 21:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1ed3ac2e231732496553c4ddc52ad98d SHA-1: f3d230b154bfad4b33b337dfe790ab7f93f3f635 SHA-256: 30c9f0df67ef2dd84b78246bfaf94f32f8e1039d6d7c63c98a4c2c0cde353389
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of multiple external URIs and the nature of the detected threat indicate a likely phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://mvservice.it/file/5441930524.pdf In PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/begekufebibudi.pdfIn PDF document text
    • http://kxnjl.com/userfiles/files/kajalajuxuzinojikere.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/67830691382.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/nosibajexazeb.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160837db243798---28113803217.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/102080d4e0d41878ec146d995ff9bd33/xinori.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/66394321672.pdfIn PDF document text
    • https://ski-experience-japan.com/images/blog//file/49393818757.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/88422522433.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e106ce30c67---vizikuxonivoralen.pdfIn PDF document text
    • https://latework.cz/soubory/12151847725.pdfIn PDF document text
    • http://df-foundry.net/d/files/bomijalugulusoravetasupa.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/a45b285fdd391ea9bd8c7722c522c5d8/46413652908.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/31427217521.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/64856f05a841ea8e4780873f686f97cf/44687753019.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/a8260da18faaf2d16622f32f54508922/89458997797.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/48279034782.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/tofuximimozivarenavofok.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8d2f2966be6c7497800c12073c2a0a1f/movagakazo.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20136066350.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/dadufaw.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160977831668c2---31092442599.pdfIn PDF document text
    • https://wagaskar.com/media/72596643990.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/e197fd7a3f2a86f87e9d2f639c4c81af/dokukixi.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/04544d425061e62d2113aaf82c3f5b51/vipezafofojuj.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e77762e3950---91188393726.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=opposite+of+mutually+exclusivePDF 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_off0000fb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB65 10844 bytes
SHA-256: 6f1a51cbd1fbf63e54c03896965bf271d6dd8f4098c58fc81fd9d078088027b0
font_01_sfnt_off0001149b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAD 17396 bytes
SHA-256: fa47b1c1a2625e4624739eb125c01646e546b00440e4f832c8b03793416e184d

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