Malicious PDF — malware analysis report

Static analysis result for SHA-256 1017d65963b5a717…

MALICIOUS

PDF

103.7 KB Created: 2021-08-12 19:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: b2f663d1933862889567cc7f1d4132a8 SHA-1: 2d0619f303b4fa5a733898ba002bba444ac50727 SHA-256: 1017d65963b5a7176242993bb35e50851fe69a31a91e038e1f20577b9774df5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/biwapamini.pdf In PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/19151538737.pdfIn PDF document text
    • https://cristalensi.com/public/File/22275104183.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/9795e88617b8327e89e21c841e785e39/71381437799.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/eb7e4b94ad2b5dd292013013831a4ed8/56932737067.pdfIn PDF document text
    • https://lemanssrl.it/file/7808073650.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c2a5eb852---43066730336.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0f8bc533d---kevozexowawowenitiken.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/xenedobanud.pdfIn PDF document text
    • http://msiutilities.biz/documents/janexepogi.pdfIn PDF document text
    • https://purefeeling8.com/data/file/78812847854.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608574c1e8490---gerone.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160910a1371564---391928473.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085426537fe7---vinukaseripeboke.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/74485236343.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/nemejakiwaz.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f546d778f4---39206222414.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/geduwawivevewamonu.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acedabd4ea8---58921289132.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/044cd301d97e763afefb2658c778d234/nirimejobibeporetawofa.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ebf318e3a681086830eb7f803240637b/wobazejizilojajitojezosiv.pdfIn PDF document text
    • http://vhshf.de/File/vogesuloxavakiwewozalalu.pdfIn PDF document text
    • https://csn-alliance.com/data/files/85364467957.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=streaming+boboiboy+galaxy+movie+2+sub+indoPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000132ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FF 16116 bytes
SHA-256: 74ea40c6abafff908ba0a862ebf25ee1d47d31f530ca964bdc695191fb21b084
font_02_sfnt_off00014858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14858 11308 bytes
SHA-256: aa852b39fda6f6f1a9200f318dbf0f668ad997e3226cce4e056f9833a4a8ef0a
font_03_sfnt_off000162cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162CB 17392 bytes
SHA-256: c38fa890bdd658d99dd57c596102caa05002413a4453417923fd143d173618a1

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