Malicious PDF — malware analysis report

Static analysis result for SHA-256 1797f97ae4942c23…

MALICIOUS

PDF

86.1 KB Created: 2021-09-05 21:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2d487222758b409f2c38655fd6ff307e SHA-1: 2a5abac7ad3161ce1c7673fd58c7204b3663fc85 SHA-256: 1797f97ae4942c233334883e68e80832a6379595cd4da0e11b93bc2cc267d55f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to host malicious content or redirect users to phishing pages. The presence of multiple links on disposable hosting and the use of UTM parameters suggest an attempt to obscure the final destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081a930f10c1---7736998218.pdf In PDF document text
    • http://www.lnk-creation.fr/upload/file/galepulafikagalusajoro.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/8a1h4d4kf02kc69ab9mu9o1cuj/59748506539.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4ccced1ab---kupevidiw.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/romogagugavax.pdfIn PDF document text
    • https://nepalaviationmuseum.com/userfiles/files/77912755967.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/75344184864.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/nilufakunawodubut.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/xazoruzudowapekogazikufi.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/72387546222.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/86819252292.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/52240227893.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/tifepadazivoli.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/nejuseba.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1607eab47274ea---nimexanukadipopoxebafoma.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/87ef716e927019b455c14d0e8095aeef/9694387700.pdfIn PDF document text
    • https://capecoralliving.com/media/file/gugulux.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/161165c6c88a2e---lenujexutinawavodir.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/70807128993.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/5lcdnon8p80o6beeettu7qem2a/xolodageku.pdfIn PDF document text
    • http://markasib.ru/ckfinder/userfiles/files/88838732988.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/lapisakibunawenabojiduk.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dddd085bac4---68164779704.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/13303639139.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=anker+soundcore+liberty+air+2+manualPDF 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_off0000e894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE894 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A6 18700 bytes
SHA-256: dcf474ba73e299650260199139720c966bfb21d9b56a8541527200b7879003b8
font_02_sfnt_off000130b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B5 11080 bytes
SHA-256: 5ad41e23e97bb6e7a4484b66dbb972c58ce74cdcbe9eb751c79f5bf261e6e586

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