Malicious PDF — malware analysis report

Static analysis result for SHA-256 1baad14fdcc42ba0…

MALICIOUS

PDF

106.1 KB Created: 2021-06-08 07:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e00ed5ec58d50ff230f369c683ead340 SHA-1: a3a2aa69d18e79556fdf4f70a39ec28a55d0c38f SHA-256: 1baad14fdcc42ba0f3b8efb6c4306ad8cf87d12b705267f26faaee62f00c6ab4
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 0.9997

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://crysiq.ru/uplcv?utm_term=sony+pxw-x70+service+manual PDF link annotation
    • http://portalcom-b2b.es/img/user///file/_0933562001621599575.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e64d36753---podilozojopebekena.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/ekk1k6skol57qjknaktc5i64oj/16903361349.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160723f97036ae---fuxuzilegupi.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a1141ebb7---wovulap.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b68271491fa---15726556989.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/69378238979.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086070b0eed7---gemupuj.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609897b1cec4a---8127348888.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/ripabifuku.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824322667aa---46720513644.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/2b54cb201a278d5f58aefba4dc7dc870/72639286302.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/94143878396.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/58bb8f8255c328939a85faa8f6dc0174/78322205821.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/0250bfbe01b946e9061ca8fa34c2cb45/gepugudowevewowokidigis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000151ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151EC 3996 bytes
SHA-256: 20ed94c69c173b3e876bd1499b5cf04221634d0f0942d57291d7180b84967bdb
font_01_sfnt_off00016046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16046 5760 bytes
SHA-256: 9c7221a1f5850ab5121533a9f90f38280d2321e12de59dde8be830ff4d5536dd
font_02_sfnt_off000173f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F1 12324 bytes
SHA-256: 9936416a3210f9296b53c360aefceee076e0b9f4e82ab0518349608c30dca6d0