Malicious PDF — malware analysis report

Static analysis result for SHA-256 14214ed183e982e6…

MALICIOUS

PDF

87.8 KB Created: 2021-07-16 12:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: c2176d4b10bee12abdaa4a19dd40f45c SHA-1: c31fe6dd04d0c58ba33c688bec03b7750bcb357c SHA-256: 14214ed183e982e6fe8ede08a15529455426a80e25dacf9f12b7971218480f43
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://chcial.ru/uplcv?utm_term=how+to+merge+files+into+one+pdf+iphone PDF link annotation
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/bc70c20f5849b33e63ee084553c194f8/sunakaka.pdfIn PDF document text
    • http://broomfield82.com/clients/4/48/489ff1710263d1ca947d92387d56c809/File/56512652111.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/85552131015.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/sos21em3j21i0divp684gqbdch/giroroleravozamuw.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/3709609171.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094da03793b9---rozinorufiwisevudisuseso.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/9be27e60820fd6ce11a91d82b17d752e/rijuxunixewabowa.pdfIn PDF document text
    • http://jamessham.com/admin/usercontent/file/92293276702.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/foditekilikagizasunovag.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080287a28248---texuvivu.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/am2i0p0b63n69fimh53ga2qqqb/folope.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/penavupikezudovik.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a2b95f1b6---muwopogomemunifixelig.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7457eec589---sokakegasowutubigenemel.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92cfda51dc---fefexofigiziveji.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/sivaraxanasefu.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/a5b6lvu5l4lmu24f345t0h3to6/milaxotakubudegonefepab.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/4d36e05a446d033872a6e2f6e8f17841/zifizijarefowexuvivev.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/xigejejozewoguvekupazo.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d1770d969---89560354186.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904c9d834a7---11057551376.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/gagufa.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/zulini.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a881fe216e2f81105d2a38aaca4c67c8/xokozudapaxawive.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/h5pun150l9ct95p9flbu9j0757/7718229110.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9fabe4002---26524784081.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_off0000f104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF104 10860 bytes
SHA-256: f8aad201dfe530e64e90e8cb108888af04d2dfa9860c5870cfcfb4b6a68822c9
font_01_sfnt_off000109a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A4 17752 bytes
SHA-256: af867392a2474219f5b064582d5c204536582d5d94214a0f3c668cc4a63516f5
font_02_sfnt_off000137e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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