Malicious PDF — malware analysis report

Static analysis result for SHA-256 1970170ee0cdcfb8…

MALICIOUS

PDF

83.4 KB Created: 2021-08-15 00:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 85db35e27a746d83f43a40bfaea67d10 SHA-1: b3a7e792dd13ecc296aa97ef368d77b1f46848f9 SHA-256: 1970170ee0cdcfb83ee96dd49a181fa6ad7105946eed9bdc2ee3087c312ae73c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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 https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/3b6f5a279ec50743b0e85909c4b26f4b/vefolujiwinalixukonowute.pdf In PDF document text
    • http://studiofantino.it/userfiles/files/53533781986.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805d808093d---28517358460.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/64802294671.pdfIn PDF document text
    • http://drlalashow.com/php/billboard/uploads/file/15325652903.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/14671529945.pdfIn PDF document text
    • http://willbramephotography.com/44396836056.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c2bac25f5---semefirunefox.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/sutoraburutukixap.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/87588810973.pdfIn PDF document text
    • https://capecoralliving.com/media/file/sitafizizulig.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/lovuxob.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/36br77js0u02mcmpq77d2n520q/89843515196.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021071617350185.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd279d1e4a---ritinadetabunazurin.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/fivuselesusutokut.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608712b16582f---86491706726.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b00bb3b21f2---vujit.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/iaobb0v3ohvs2ot9s1cahqbqh5/67147246619.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/82746065394.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/lejejoxa.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/9219582696.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/28475278944.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/durowupalatokeda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=filmyhit+punjabi+movie+2019+ardaas+karaan+downloadPDF 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_off0000db01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB01 11824 bytes
SHA-256: 229d551380f979c346ab32b8cb15982411b367266e009b0e6cf18432850bff8f
font_01_sfnt_off0000f6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EF 18320 bytes
SHA-256: a4ee545f688bd20eb57283b539cd83730ddad3e16b7e9b2b45e4b49605130e17
font_02_sfnt_off0001272f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1