Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f5210d001ddd9f…

MALICIOUS

PDF

88.3 KB Created: 2021-07-02 02:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d92a1a30f3b42cddd5554e7801c7b64b SHA-1: a2df36ace945013d3380d6c9aa3fa5dd5d5ca312 SHA-256: d6f5210d001ddd9f232a4802a7794ab6632de3552384f488f29656e6c6eaa97a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This 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 WordPress upload storage and other disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious sites. No scripts were extracted, but the presence of multiple external links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://archism.ru/uplcv?utm_term=japan+times+sumo PDF link annotation
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa12e084a6---27710622128.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/d3099feb000b8480031516cf36554d4d/72649745626.pdfIn PDF document text
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/18761202520.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/d74a867b9a2172e5a899a3be6bb117aa/beraf.pdfIn PDF document text
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/jelajezigitizixufebutiz.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/bewowokapozaradelof.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/34fb7ddb7ab265695c381da3d01fcbfe/siwupe.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/22723055571.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/8b24fe303f289f88003f4591cbcd56ad/kavujuvepem.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/48686695080.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/zuguzozijifizuzomuna.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/vezejeg.pdfIn PDF document text
    • http://liddellgaryfamily.com/clients/863293/File/robulomubejinabedu.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f133c0e03---pusowi.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1607278cc45004---10273427088.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///5626985819.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4557d13b7dcb2f76158c8c81a870a9b5/tajaso.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b96dd3a446---11567113241.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f293666426---sozijagax.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e9a594ce0bf841bd750b09758844b1d3/jobinaverurebisigugek.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/nfj841vf9plqv9rj9g037197l1/lowulatuzejelewesupamul.pdfIn PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/38190484033.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/xubuxirolijajiju.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f16635a0f---resibowozutu.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c62b4838b08---75151938266.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/wegefigusanetujeto.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_off0000fa3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3A 16304 bytes
SHA-256: 649f650e213e6dd95c59de608f2664d4bdff6c07c6814974dcb96ec5eeadcd7e
font_01_sfnt_off00012480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12480 10356 bytes
SHA-256: a54b8e1e239182832eb026950c193599ef1d67978056f16b87f70279e15de387
font_02_sfnt_off00013bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1