Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ca90dd949944ab…

MALICIOUS

PDF

90.7 KB Created: 2021-06-28 06:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1e192394181607098a2b0dd1c90c5068 SHA-1: 29500a933053742fda2296916b620f0a2349d633 SHA-256: e5ca90dd949944abf722f6f50132463a736e0453d66fc38d283b9b23f6640f92
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or conduct phishing. The presence of embedded URLs and the nature of the heuristics strongly indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://oniceh.ru/uplcv?utm_term=aircraft+for+sale+europe PDF link annotation
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/f3ibbj82oukainjqc03n5m39q2/19993323446.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aaa27c8590---80853628921.pdfIn PDF document text
    • http://nature-revive.org/files/file/48360021602.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/23027299491.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a014c3891c9---58447677223.pdfIn PDF document text
    • http://drjoecarver.com/clients/49355/File/17867458098.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/h0ceo49682hbiia2imco0dpc5n/77827665462.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ba3ca4abf---54064926532.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/10154777928.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/a3a96517fd4103676f0b91e01b4cf570/76772763586.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/sazubesas.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072923cb4bc0---66932721774.pdfIn PDF document text
    • http://klefmarken.se/upload/file/43537914864.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/3678199440.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/60236659001.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/vifuxoxemamejejon.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad271c212a---bagivazuxuretom.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/a8gjcph62vbn97cblgmsapunoi/wivegive.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/b99bf32c756f1f4b36e12e09814d29e9/7228290304.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/tamome.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/75476214188.pdfIn PDF document text
    • http://khanaphatgroup.com/UserFiles/file/16250937956.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/e6kvgvm1si96trh56d40q66415/xulesojalit.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/0294549a027b4fe3ead73ef80d53e50a/23771509841.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/dfljs8lj2g93n99hudn6vbbt5p/97292065950.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

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_off0000fdc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC6 10448 bytes
SHA-256: 2cffcb7a7fc9c39b7bf787ed75c839bb9641b67d90ae173667685817f89721d7
font_01_sfnt_off000115b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC4 18236 bytes
SHA-256: 00c1ae1513f2178e28d81ba919172fb4feda0a84ce7fa427dafd75224118d1e7

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