Malicious PDF — malware analysis report

Static analysis result for SHA-256 30676e1a1ba41822…

MALICIOUS

PDF

80.7 KB Created: 2021-09-12 13:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5ab6112868623753f1fdb1d5945c13ba SHA-1: 06eaa4ec851dac9ea5c4a69c8b09e40fd73673c9 SHA-256: 30676e1a1ba41822a45561620c6210b199f48ef703806f5bdf2b2726cc2abed0
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users to malicious content. The presence of these link farms suggests an attempt to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://fluffy-chins.com/images/file/wovudozoxipoginugofaj.pdf In PDF document text
    • http://mamolenasnc.it/userfiles/files/70725793105.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/14019504421.pdfIn PDF document text
    • http://worldwidestationeryholdings.com/files/file/fegekedimasatovonetob.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ti0pkvn02cvht5n8k9te96mmd3/vitakutusafire.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c9b1e7bea4c8ac0786768ea19bc04f10/57421025432.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/guvosexosugimedepuxize.pdfIn PDF document text
    • https://femagnet.com/upload/edu/article/file/bavubofulovejupifutowub.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/gezopizitedeta.pdfIn PDF document text
    • http://0985028898.kad.tw/kads/ckfinder/userfiles/files/6231641325.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/ludewepodowobatos.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/gifoduforogizapakevo.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/kibalunu.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/41332752207.pdfIn PDF document text
    • http://goopenapp.com/uploads/files/92310983057.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/ie86pemvt1its9975h2eokgkdh/95070235643.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109111010456191.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6c93c3288---rubunine.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/mazigexozobiwekagazeledit.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161306c59e1d2a---taxazisajuxapepezu.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/lijusifitinatusojaweg.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/71559712953.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/59991731588.pdfIn PDF document text
    • http://net-marketing.hu/images/files/lovorodejevowosa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=chathub+premium+apkPDF 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_off0000d445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD445 19024 bytes
SHA-256: 4cb8e9f3c70044e1c24c7887c24d0da4f2312e7db3aa766d6acca1ca02b07449
font_01_sfnt_off000105f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E09 10444 bytes
SHA-256: fd277a241c6d4dff6dec306fd5b37ca9d1202c1c6919f024be1c92d99447c978