Malicious PDF — malware analysis report

Static analysis result for SHA-256 284eee4c119fcd10…

MALICIOUS

PDF

110.6 KB Created: 2021-06-27 12:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4c3e0fb538725d74c17641d37a58bbe5 SHA-1: 25ee7fea41ed0d438b013a7f6fe23f195de5fb29 SHA-256: 284eee4c119fcd10d62f32d262ed7361d0fd8877ec99ad752d81b0709a79b8b3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to trick users into downloading a secondary payload. The presence of numerous links on disposable hosting and the use of UTM parameters suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609be0af33349---japanuzumeta.pdf In PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/vb1q1ig1kb8u984hc28rkogpmt/75679141282.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/dubupovuwalej.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-26/20210626022722658553.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/3cacaaab44833131251e502619e0277c/zupurefafojemefete.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746a85dc431---60413617978.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/23651875587.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/29118177084.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/bf22mdiskottv1slr1qb6539e7/78571988375.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/69468525478.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/zalamutimituxiwezo.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/94914338229.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160722bc83f928---bepivavenugel.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607780ea5b066---xiroxananiwivaduxafakegit.pdfIn PDF document text
    • http://artospace.com/pics/file/vodedisotonozem.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/6907al59tlahk4sor43tit99u0/dotagepaja.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/f487633ceba65e197c00d5201e625c5e/54852771278.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/abpvn7tchmi3jmd14hipenhqpa/82227835322.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/a45ab8afe22570c4ecd5be6c308a4908/xejovoz.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/liwolapesawimebewadet.pdfIn PDF document text
    • https://parfumzone.ro/files/file/mofupujizoba.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/0sl2iokjo40hfm11ndbbraigl7/tuvatinuzigolojuwalurune.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a931804c2ee---zibulo.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdafc9806a---89886168808.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=wpa2+psk+crack+androidPDF 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_off00014c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C29 10436 bytes
SHA-256: 5b55ce5700188148c62e0319a7118478ae453054bb8675594a986bc63b61d3e9
font_01_sfnt_off00016405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16405 18756 bytes
SHA-256: 74b77a2a3cf79a845eccecf3c797ef60cb04b0f5710cea40638fb6c81b5aa373
font_02_sfnt_off0001955f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1955F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1