Malicious PDF — malware analysis report

Static analysis result for SHA-256 69208223f0e837dc…

MALICIOUS

PDF

81.5 KB Created: 2021-05-10 03:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 32b543307c2cfe7dddaef9845dcd448d SHA-1: c2ad2383d5a08f039ee927fa5b3bad429b1d6c4e SHA-256: 69208223f0e837dcf33c6464a89e858d2589ea07c91aff9e479b79277531292e
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9998

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 http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16083ba391d35b---22754847694.pdf In PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8f059fcb6---26447783772.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/nfhn0tbvme90vomisnl5tt6pgi/barulelozi.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/447379a49c5edfbe327c3d6e919a91fe/lutobawixiridapojexilam.pdfIn PDF document text
    • http://splogservice.ru/content/file/towaposunu.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/238gci3k4q7buocjpa53tq7qo7/loxulaxebagefutuwexu.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/d8ps6nnjfsq4vfd7cs5mv149cf/62440351146.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/87502977820.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608442c7bed1e---wefedazoperojukevaror.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/zudolofaramezubesekirawux.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/1b7648cef22be58d941393012769ebf5/rulilepewinel.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ks2jsha9e9h468p0m2u8lr0b87/gerexixakifatikijutokubi.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737ed463636---xodek.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db449e10b8---23411559579.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/eda49fe28a5071e086fb17c26a63c331/74760754028.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/fd872d71011528e8d823ad314e47ec07/88713748280.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160916614858b6---sawifovakekabupuzi.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/00486eb26f44268d2bfa0e637e4c2ab6/leziv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=house+plans+drawing+software+freePDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FF 5144 bytes
SHA-256: d4c06d73ab4b0852176a20ce840699488e0162a1c957cf0f3b7de4635d510a11
font_01_sfnt_off0001069e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069E 10556 bytes
SHA-256: c4671281651279b389a88330ed22e62791f03396caa3ee5206c2ec4e54b2c9d1
font_02_sfnt_off00012ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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