Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ed581ef59c888b…

MALICIOUS

PDF

87.1 KB Created: 2021-09-06 19:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b959e359cd002ad3d59202a72d3fa6b0 SHA-1: 5d02d93cc07f15350809f8d25fd022e0fed9e0d7 SHA-256: 01ed581ef59c888b673578641d8f699b28cf17c68b573a33c088efea464c3bb7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and other domains, suggesting it's designed to lure users to malicious content. The presence of external URI heuristics and link farm indicators further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://garglob.ru/uplcv?utm_term=diccionario+egipcio+antiguo+pdf PDF link annotation
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161213e6766b34---92993320587.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/52277441905.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/8epg8l7q53vhhol3c5gn2ltf1h/71073300438.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/maluvizuxixukovevipabo.pdfIn PDF document text
    • https://melz-feu.ru/upload/jigupefuvenezaninusuwi.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/gelolegofebesekifulile.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210629182603.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/jineduwagejatawev.pdfIn PDF document text
    • http://614move.com/clients/4890/File/kefev.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/taduva.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/suladejajatovaxivukax.pdfIn PDF document text
    • http://parvazyab.net/basefile/api203/files/dulofoxedunitasubifisixa.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607233de0e7b8---dipem.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/8f6affd007507edf7ac3b8eb39cebbc8/76112086680.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/98449947071.pdfIn PDF document text
    • http://marklaliberte.com/fckupload/file/rurigovetiregexizo.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/ea26c978cf5399925ac36b18bf9ff271/60331699107.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc97ebb350---namuvokutewukoluxer.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/10833904979.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/86079166f9f5cedda81aff26c5e20d34/38908698444.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/mevij.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d5c7112d9d27355741b2f95addb4f7b1/105149283.pdfIn PDF document text
    • http://ltptech.vn/uploads/userfiles/file/51090033327.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_off0000e8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DA 21020 bytes
SHA-256: d00b25b634ae5dcddcfd38e3bbe5cfe91d9bd182b26b81ea7fc494da42716fdf
font_01_sfnt_off00011e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001366e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366E 10684 bytes
SHA-256: 3acdd1d6f5be3fbc1e4cda046f5d3ca28620e44891b55997fd9acc00de300dc9