Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0663a6d4f266d39…

MALICIOUS

PDF

76.9 KB Created: 2021-06-28 05:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3183483c676f38f37b1cded1d4f8cd9e SHA-1: d018e4355d8746e3b7bbe36a48e947a4566c023a SHA-256: d0663a6d4f266d39a60c3a8ff1dd0e86dc2f68aac3584aeef89fcbdda8a7cb6d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://allytemp.ru/uplcv?utm_term=tv+shows+with+drinking+games PDF link annotation
    • http://bacvietexpress.com/upload/userfiles/files/vekuzuxevemij.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/59220185286.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/10321602305.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/loc57qsraqlg1k727kba85rji4/81101965073.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813917bee29---39773669478.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bb35d238b---32084750058.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/59927903877.pdfIn PDF document text
    • http://mega-gold.com/userfiles/files/16500388831.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acccfd865a9---dowimapizobuwiboxade.pdfIn PDF document text
    • http://goldway.jp/upload/board/file/toxagek.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb337cc8e1---96218807505.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/6865205197.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c54fdcd3b94---sinoxofov.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ae389e638d2---xopaxalur.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/7c69c30e77b0a749aaab9b668498538c/mapilenizewejafikuwedame.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/65788586901.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/64996378313.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/58b458227681a4c4dc6b7b08c82a3b1a/ravupusotasitumase.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/88032572510.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160abb8e34ecd8---mizelumotadatadikobu.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/6d63b9cb0b2b02215c23712fe4317002/66566573265.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/sixekiwojeko.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/35016547048.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/0671b560e00ce3d99b663c23bc63a8df/12307513401.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_off0000c480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC480 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC92 18740 bytes
SHA-256: 305479f704ffb55dfae9e369a4f78ef11ab664b9c86108489706735a3218c231
font_02_sfnt_off00010bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF2 10856 bytes
SHA-256: ffa96d14caeee8c6f3059d22e597f9f96d32b565acf0492253696a12026fa3e2