Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b13476e4ef236db…

MALICIOUS

PDF

86.1 KB Created: 2021-09-13 12:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 94ef2090d9e6229fec1a71d0724785df SHA-1: 7cf995f1a53b55118f11354ede20a95b4c7eba16 SHA-256: 8b13476e4ef236db5a69b7b41412c3a8bdc64b9bc88027021e57816b679e72a4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates that the document is a link farm hosted on disposable domains, suggesting an attempt to obscure the true malicious destination. The ML_NYX_PDF_MALICIOUS and ClamAV detections further confirm its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/59c4c5024d7136409988f29417e830ba/gutujab.pdf In PDF document text
    • http://songhandiban.com/uploadfile/file/2021090613071073499.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/49422247023.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/89714418048.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aeb8b1220c---xiboselim.pdfIn PDF document text
    • http://af.ssla.ru/images/fornews/files/24132678275.pdfIn PDF document text
    • http://ms-domino.eu/images/file/files/65792537742.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/10ddbcf4866cf260ccb0a0cbe89add50/zijefawotefiwesukub.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/sapojabogonogutetamut.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/70599622715.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/tojotoraburujitupigefur.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/suvewimuzif.pdfIn PDF document text
    • http://revize-elektro.info/UserFiles/File/vufiludapo.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/gikevunaluparolakon.pdfIn PDF document text
    • https://phm.vn/upload/files/revox.pdfIn PDF document text
    • http://rts-3.ru/upload/files/febanikiworufet.pdfIn PDF document text
    • https://cytairtool.com/test/userfiles/file/20210901_044b7.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109081417266303.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/29096002910.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/84005552504.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/xajemidesabinaponanemoti.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebe893f98d---pedulewej.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/80231484766.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=iptv+lite+for+android+tvPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FE 17552 bytes
SHA-256: 0ee39b0181aef8c1a70d0905ada5840879b76f6d567fead3e9dbcaa60112492e
font_02_sfnt_off00010428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 17844 bytes
SHA-256: 8454de8385f6618d926d0d3d3824c07a09da067f128a7ab86f2f78b0af92d7a2
font_03_sfnt_off0001331a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1331A 10340 bytes
SHA-256: 27c44b981effe8034867649df0fb7ce127981b9c7aa0765608d37d9de10d37d4

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