Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5efed2be97cf07…

MALICIOUS

PDF

86.0 KB Created: 2021-09-05 08:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e1e709fe7b4464e2ff2ab16c68f5a1f1 SHA-1: 2b074d683e03dda5d1f8b04814333b4e520f70d5 SHA-256: 2d5efed2be97cf07a124d8e415a62c911bd26cea61a612d49914814e0babfa9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, possibly leveraging JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/7620e75ccf895dd36c15c517fdcb7a93/sazatokazewurosixuzowe.pdf In PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/gp21phloe5ul3bkpq08c9j9vlg/zodepalexuvizaka.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/38270138329.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/16171006069.pdfIn PDF document text
    • https://nada70.org/userfiles/file/sagakupuvafuvemojurevu.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202108261448186597.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/51679275896.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/bonan.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210827183223_1wfm02.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/0qjtmohgvhu9vdkvjfgjim6t5l/63422763653.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/nozawutusut.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/rarurajulivewe.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/d94f9a3035e143b85f06b661d04403ee/jekurupizopanome.pdfIn PDF document text
    • https://mimpishio2bet.net/contents//files/84085431077.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/82970d2c8f0cc0aa389db21272262216/86180338626.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-7/file/kawofisumujepul.pdfIn PDF document text
    • http://word.mn/uploads/assets/47455824642.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/guvarobojozas.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021060710151173499.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/19431226316.pdfIn PDF document text
    • http://langmypham.com/luutru/files/geriseneraxuxixo.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/welub.pdfIn PDF document text
    • https://stvorki.ru/files/file/zedurofiworamibujiwi.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/72906747948.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/17925975166.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/oajrtnggub3td5bou60fd45u22/11981100133.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=domino%27s+pizza+history+pdfPDF 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_off0000eabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D2 10796 bytes
SHA-256: 0dd565f0ef8b81f1c56c9babaf6ce3fa51c22ea1ef1206c82b9a7bbcc7024e83
font_02_sfnt_off00011b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B92 17688 bytes
SHA-256: 30fc2856727e166b85dcd1a80ba98b689ff87000139cb0753e8b5498558a134f