Malicious PDF — malware analysis report

Static analysis result for SHA-256 02415d5e3c952947…

MALICIOUS

PDF

82.2 KB Created: 2021-09-06 14:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f58e46874b7ce61d8e07566228fbb7b5 SHA-1: 6628445c2b47ccb593b6c2f5740c82dc78942324 SHA-256: 02415d5e3c9529474cbccf4c180e291278ced927b9c3924098da7410343db245
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external URIs and links to compromised or disposable hosting, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, indicating an attempt to hide its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://irlanc.ru/uplcv?utm_term=minecraft+crafting+recipes+list+pdf PDF link annotation
    • http://animalscipublisher.com/files/upfiles/file/53028209456.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/49f7bf199c31c7704aa13c2e7b34d5c3/74793084958.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160caf8132b924---wizuxovisugilut.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/8f6b1a75550d5674e845d42a0779e591/xuxuvenunorigapizexexosob.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/q95i38sufdhls1a5mm8f3kstv0/17847735920.pdfIn PDF document text
    • https://imihwa.com/uploads/image/20210823/files/20210823194345.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/vedetejejixelatevibe.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/kutafesirajalozuna.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e85d84a76ea---66072111671.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd37f55b07---peded.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/wutuzepader.pdfIn PDF document text
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/zazufelabufaxuw.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/vuxanozinat.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/92548410001.pdfIn PDF document text
    • https://primer-spb.ru/files/files/pobumaxujerupofi.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210719_054640.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/widak.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/1e15f96fdf803274a6fa586103e84727/botukanor.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc1e67cf266---96169263915.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85a6ee2878---tukal.pdfIn PDF document text
    • http://ulleungroadtour.com/FileData/ckfinder/files/20210708_5FD550DFE1FAD2F0.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/belunupabugab.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/5122768354.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/08b7be9f9c9f27424a68550ca4de6e10/bofebinadosovegosotovil.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_off0000dc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC65 17752 bytes
SHA-256: 823c072560f330a25c5cd4890672f983bf346472df2e1a1e72de41b503c25a72
font_01_sfnt_off00010aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12302 10668 bytes
SHA-256: fab97c428705fe8761c41f7f3dd2676fc6fac5720a36047b3a82b033df2a6871

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