Malicious PDF — malware analysis report

Static analysis result for SHA-256 218e786281f6f0af…

MALICIOUS

PDF

73.2 KB Created: 2021-09-07 02:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8a65ecba4f2ba49544cdfd6ca43bab8b SHA-1: 93ab870a27ada83b0a19240c25ba155d5bd8ca4e SHA-256: 218e786281f6f0af26e16b4f5ab26f3d6c40a89e74f19de2efa3b34d1d611648
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The PDF structure and embedded links are indicative of a phishing campaign or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f15a0a40fe---filaxoz.pdf In PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbc0e54df2---16410560762.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/49424932624.pdfIn PDF document text
    • http://wearebryants.com/clients/3/3b/3bb22ab34fb8fe691aabc4d0498f9caa/File/60234592152.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/ce6bffbb6dcbe7adb22d4ae2358a15bc/pituzukijukinufazatoz.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160e41bc0715c9---21359363397.pdfIn PDF document text
    • http://library.nesdb.go.th/ic/admin/ckfinder/userfiles/files/20508487457.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2db8b4fa71---mukimiguxamisewerojos.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/41627399135.pdfIn PDF document text
    • http://topimmigrationlawyer.org/ckfinder/userfiles/files/57177870002.pdfIn PDF document text
    • http://acquadiqualita.it/ckfinder/userfiles/files/43581909484.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/31a5941184240c6c54cb2b963c754d53/4247217883.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d07a91e90ffdc3ee6f0a01cce94638e0/geluf.pdfIn PDF document text
    • https://easresidence.ro/app/webroot/files/userfiles/files/38306534467.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/fikamaxusag.pdfIn PDF document text
    • http://azizolace.cz/images/file/ginufutubof.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/6vj13k6a9sjnb3o9ea5hj0v08f/35568844271.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/8901270214.pdfIn PDF document text
    • http://dzbnf.com/upload/file///25037251747.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/449ed15ba2aaa65648ff63dacefd14d6/merowujokarafiwaba.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/09447cb50ed09a9f0e74a9e9c6929f26/meganazuzudowizixavalidaj.pdfIn PDF document text
    • http://fittbikese.hu/files/file/69207233277.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/pomirosojamotewefalidel.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/d8a4ba0f7070a472cda452ca25b7e577/63713269064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=advantages+and+disadvantages+of+behaviourism+in+the+classroom+pdfPDF 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_off0000ba0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD21E 16464 bytes
SHA-256: 01d930022e93f9f6a17b3536c3b43bc9938da9be83348615ed111bc898392961
font_02_sfnt_off0000fc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC81 11356 bytes
SHA-256: 89ac0d53a81552babb48aadf6df45474ea5047c43e6992178c0e3e19795bf76e

Open this report in the interactive analyzer, or submit your own file for analysis.