Malicious PDF — malware analysis report

Static analysis result for SHA-256 80680add65079ba7…

MALICIOUS

PDF

73.9 KB Created: 2021-09-21 07:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2b9e64cbaa9fafbc5273cb444bae850f SHA-1: 8017a7002e8addf7ccad2d9fee06d5ba5c362442 SHA-256: 80680add65079ba7ca5b339f955c6bdabdae7e5335ea25e8857876d2d07e0518
164 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress sites and other domains, suggesting it's designed to redirect users to malicious content or downloads. The presence of a 'download button' heuristic further supports the phishing or social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/69a17b156ef84e2799575fb16e98db8e/49028586434.pdf In PDF document text
    • http://9275522-travel.com/userfiles/file/43310774860.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161306e053bd2d---kesaxatonamosu.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/9075684692.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/nejidamefugupefojetujoxir.pdfIn PDF document text
    • https://zlatartopalovic.rs/files/memoduwuvela.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/15613810046.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/9318274367.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/14359956394.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/basekozegeda.pdfIn PDF document text
    • http://sambometal.com/dataroom/file/vokesevazolukowarev.pdfIn PDF document text
    • http://firegallery.ru/img/upload/43966220977.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/18724802249.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/daluk.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3a8f22050---wuziforuziropegepur.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/feluvuduxulobaruvej.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/31364988939.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134f0c9e350e---21154412488.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/9411439731.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/miwaxobi.pdfIn PDF document text
    • https://matricula.netlandschool.cl/files/37085246762.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac7cf73c6c---73357048787.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=fortnite+32+bit+androidPDF 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_off0000b814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB814 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02B 10436 bytes
SHA-256: 59b10b94b912e7898092bb0fd97ba253d6ddacceabe0a928494dbd406fc670ca
font_02_sfnt_off0000e7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FF 19088 bytes
SHA-256: 44e25625ef4abf1537682fc444a8a6a5f6d6f0610e76154a31cb9028826d99bf