Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ac79c3e7ef6d33…

MALICIOUS

PDF

75.5 KB Created: 2021-09-08 02:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 20b25bc07f516ebbed7cc809677c17c2 SHA-1: f718d37e8d68f2bf404d040eede9d46f4cd7e7ad SHA-256: 60ac79c3e7ef6d338f3f108070d395eaf0aed8bc57ac5971afec8b48df9345f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://vegastel.eu/components/com_mijoshop/opencart/image/data/files/gidifezupegusidixesamit.pdf In PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/sokn4esigf8g1n472fqfgmb1mp/74689455349.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/70471046222.pdfIn PDF document text
    • http://gzmingjun.com/uploadfile/files/20210818_224517.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f9d5f5edfc5---64280762927.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a15b12d4787---59594465233.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/xutemevevaxonulolapufi.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/66905023544.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/73422442017.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086dc6b624b1---548324933.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/79501613639.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/puremuxobakanukafotopa.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/gadutulexuzovisajoxuzenov.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/67133062466.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/84857050539.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/76327154807.pdfIn PDF document text
    • http://placc.info/up_image/vusosuxorizojom.pdfIn PDF document text
    • https://fiscconsulting.com/userfiles/file/22345835858.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/17c067c990e1dadda7d2ba8aa8f2055a/furetobid.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802dfc3bfe1---zepaw.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/dobilabuforuzo.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/19a1e3ca84eaf3a7ff2438b2aead69d2/dibebifotofinenonefik.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/0b7f7c274ee51085d1075c5641c7a4c3/jasilususekojo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=yritysrahoitus+niskanen+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_off0000c1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A3 17824 bytes
SHA-256: 09ba7765bdee613f4a27ee6dde9572fedddf611eb262ba23435acc3016c763bf
font_01_sfnt_off0000efaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAA 10840 bytes
SHA-256: 84be71872586431896f7dac6c822b8d8de27aa83e9e7419f92aac87258f6fb9e
font_02_sfnt_off000108a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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