Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eafc1eaf21e6cf4…

MALICIOUS

PDF

150.8 KB Created: 2021-08-18 14:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f7c234698cfaa399e073f845f2904c6e SHA-1: 94aaa28b61d2f7867e54ea94d6cc782ba80e6f4c SHA-256: 5eafc1eaf21e6cf44d670162e859705acf5c705e8309c24881bd612b4b7bbe9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malware distribution campaign. It contains numerous URLs, many pointing to compromised WordPress sites and disposable hosting, which likely serve as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, with the PDF being identified as a phishing trojan. The embedded URLs suggest a multi-stage attack where users are redirected to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=pro+evolution+soccer+2020+psp+android PDF link annotation
    • https://immobilgold.com/file/12786426917.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d12040ff1---jufipudi.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/itehjsifp1cdpbh747us7gi1cd/58485933774.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/ripaseruwotum.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2cf5ea829---kokamuvupexubipezidug.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/80343035867.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a95fa7eb3b4---lakexixipejiku.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/dewikepizuto.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/29318940220.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/galowigaroxurokubizi.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/79672591455.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/9812898347.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/mepofunutisujuso.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/vban2n3c8j64etb8n93h7t6n5v/80583972366.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a484cedbced---54202121387.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/4d696979115cf6f0e24d71487e40f4da/15719579903.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/bn9jb283maftd80oa615uabcj4/womivij.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/5411757272.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/49753297830.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/46e2a46362e3f296007ac83941c7a519/vexogegoropor.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161142e0a71c5d---72059876692.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcbdcd32c9---miniguj.pdfIn PDF document text
    • http://blueyee.com/upload/file/051729303460.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/ponivak.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/3dmpr8q7t00qjllrgcoqkjl6r1/17771059656.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E8E7 20636 bytes
SHA-256: e32e055469ec79beefebde819686f901261d4283130f7b3325c900774215d435
font_01_sfnt_off00021b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000233b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x233B3 10916 bytes
SHA-256: b1ba509c8762e317371b4e341843ee5325f8f9966a3eaf892f46a3364aa2e797

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