Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f1f83ee03fa5d1…

MALICIOUS

PDF

73.5 KB Created: 2021-09-06 14:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 73c7c27a46f248e834bd9962a7f1bdf1 SHA-1: b586cb36dd80c7c3dddf63bdde01a68f75509981 SHA-256: 45f1f83ee03fa5d1dadcb2dd7a0a02cae37dcc9a9e56552b3fb6143cf9b3f229
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URI links and compromised CMS upload links indicates an attempt to redirect the user to malicious content.

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 http://yuha.be/_files/file/44667541435.pdf In PDF document text
    • http://pogotowienaukowe.com/Upload/file/zufubafovupuzebi.pdfIn PDF document text
    • http://msamericapageant.com/clients/873634/File/21115797091.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/023b9280a7c884e038dcef6f0194e348/82061350793.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/21854303211.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/a1l3ugp9302loojm8p16g6ei95/doxufobobivojatinaparelam.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210903175935_633770513.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/37632094565.pdfIn PDF document text
    • http://ombs.ru/uploads/files/zunilokanuxuze.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160e01a6fb500f---2924769322.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/bede4c98dfa60bd8497ff6cc80dba298/kukagumudosimawogate.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cb2c1cc9f---wuwogidapaxuw.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/fkk8l11bpm3g1jsdnudhcvm5i3/42395110981.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/wuvazatisosetuk.pdfIn PDF document text
    • https://ou-ravda.com/ckfinder/userfiles/files/gudajezogafas.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/jasonanofixalojarukatapes.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160744ff9da1fd---99948796549.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/41472146496.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/70081215786.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608df16da3227---sujiwajopoxuz.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/jagepazaxalefe.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/sh7apq9at9rikfe44qevd3kr25/57974582341.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=conjunctions+pdf+exercisesPDF 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_off0000be0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD621 10768 bytes
SHA-256: 980785c4428f78e4c72dac8f23daf13864a1ceabfaafae983e579c3636574cb2
font_02_sfnt_off0000ef0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0F 16228 bytes
SHA-256: 56e76b47559d9592caa5423e07240fce510a3125c12e0720eeac9ed7cea2f183

Open this report in the interactive analyzer, or submit your own file for analysis.