Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b55d72c95acf90…

MALICIOUS

PDF

98.0 KB Created: 2021-07-05 11:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 78fe98cb875a9ac0a70aa8105f0f8f5f SHA-1: 1c060248f496620171ae0f8a36e460510355cd22 SHA-256: 47b55d72c95acf9096c2d7e0c577f81bee5dd2b4c1ff439a107b6a35bc097556
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The PDF structure itself is also noted as a link farm on disposable hosting, further supporting malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f75976ea13---topujaboxajukazukidat.pdf In PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9f2823194---62158916287.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/96622992606bf535453c75ad5308534d/komevanibamisukuxemivolu.pdfIn PDF document text
    • http://inezorviskids.com/clients/37546/File/ladode.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/0d6702dd4bc9d8cdd166cc61dc8de58e/bovufekilagesawuvado.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/0e6b53f8fb23f6aced54e5aa5338380c/venunoboj.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/4ef391d3658276b1324999aeff942b84/693125218.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/76439776949.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/7eb2735ec1f98184003c580814cb0357/5953001527.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/xemekofodefiwadematiru.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/23093009115.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/3disjrgkh8jgq0siifbht6ic1t/mulipunoxuzugapimuk.pdfIn PDF document text
    • http://aqs-group.it/userfiles/files/31841388289.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3dc384832---79200327121.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/faa011b27c6cf0bc01679ab542785d64/3691878635.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b9aff248e1d---70153420140.pdfIn PDF document text
    • https://stopserv.ru/files/file/78329645062.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798745dd3ea---56383724357.pdfIn PDF document text
    • http://18554080.com/userfiles/file/foxujomigajajugivewupe.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///pokavoxode.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/zifaxelewanib.pdfIn PDF document text
    • https://mo-space.space/web/img/podborky/files/60800221121.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/3b1f69e971461548e19319d263ed9464/petomunu.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/58873462956.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=a+chivalry+of+a+failed+knight+2PDF 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_off00011b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8F 17528 bytes
SHA-256: 58ab227fe2433414ce2213464ec14061e5026c2b2f2aef0737dc0ddac43f9374
font_01_sfnt_off00014956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14956 10960 bytes
SHA-256: a01c543d1eeaf027be042b9b9256a580757b04949b5dee62c10e4317c7d8e4c3
font_02_sfnt_off0001629e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1629E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1