Malicious PDF — malware analysis report

Static analysis result for SHA-256 804554808f919380…

MALICIOUS

PDF

89.0 KB Created: 2021-07-21 17:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a80c80d143c4d276b6d260c09654c99c SHA-1: 75aa6b6e191d62869d5f3b39829850190ae89644 SHA-256: 804554808f91938008c2737acd535833dc1a5bfc509ac88a40f1fe8e666b386e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of embedded URLs and the overall structure are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://kusadasidentalclinic.com/img/userfiles/files/71342757038.pdf In PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160efd4589e95f---seredanitojorika.pdfIn PDF document text
    • http://www.asslar.de/downloads/96069744430.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/29458594554.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/mibawolano.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/5fqn78672aomn2nga7s8ou4sf3/detenigudogoluvuwujego.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/f49b826def8d9ff56d4ff1235db8179a/xopidivavazom.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/8c9b0716f8af9930da485c0aa9d253a4/83852794389.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/fugasurolakazunafe.pdfIn PDF document text
    • http://starlightcelebrates.com/clients/4/43/43e9139217482d7666ce300faf566241/File/85243058822.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/kozawaxetipotenis.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/58dbd46eb6128d9a5d24cd8311a64f88/35488646067.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/damam.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/8mr5ge48gpglka9jc873vlts5u/52771247153.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/81087128106.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/mopudasedodaze.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/sojukekadotubiliwopaxus.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/31827420619.pdfIn PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/vugurawunixikipelulojufu.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/8a5e8a0c87bcf7dcdac6adbf9965b6e3/kefijolaniwewanebiwap.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c16ef1b8d54---podifixafowidew.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/31175295812.pdfIn PDF document text
    • https://motacademy.it/file/teruzibozemenelem.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/8551867838.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=thesis+on+performance+appraisal+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_off0000f8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EA 16860 bytes
SHA-256: b2a4ee10ae2dced7e7ef2324c720a7962dc9ac27aed34a62ca6acf0d993d0233
font_02_sfnt_off00013c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C97 10748 bytes
SHA-256: e4b8841799b9a2d3d73bdf2868292f2f4a8f01df01e51e0a8a5b04585e5d67f4