Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f982de067be108f…

MALICIOUS

PDF

82.1 KB Created: 2021-09-23 22:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2296ba39bcc97ba1253b9a65245a4010 SHA-1: 5247b6835654cbb66bfe2f1d481cb88c240a4c2f SHA-256: 0f982de067be108f4c91d8b3369e54bac6e9aaa762e8305cb2eb59827a7f98d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure, likely intended to trick users into visiting malicious sites.

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://huntic.ru/uplcv?utm_term=form+80+personal+particulars PDF link annotation
    • https://associazionebriciole.it/public/file/mubevipalif.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/85289702739.pdfIn PDF document text
    • http://bckvalumni.org/userfiles/file/73462782672.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/8825475801.pdfIn PDF document text
    • https://weilmclainboiler.ca/fck_upload/file/62738569673.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/97452764409.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/85209853943.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/161479a0d2fbe1---34259654832.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613b57ea846bb---90496333156.pdfIn PDF document text
    • http://honda-vo.com/upload/file/kotazakulewigaxijilodupem.pdfIn PDF document text
    • http://yidaig.com/uploadfile/file/20210917165517.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/99795653982.pdfIn PDF document text
    • http://sinoorchids.com/image/file/vogejuvererojodata.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/suwixadatenejupulun.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/59570204475.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/7229090686.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210913_8F94998A6EAECBBA.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/87069438252.pdfIn PDF document text
    • http://envigest.cz/upload/file/lopuruzixoborawateti.pdfIn PDF document text
    • http://taociren.com/upload/file/2109051629176501263vwgvuwanb30.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144ed0e54904---57307741427.pdfIn PDF document text
    • http://96stone.ru/userfiles/file/7241393304.pdfIn PDF document text
    • http://printific.com/images/contentimages/files/temonu.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/rejuriwajodovatab.pdfIn PDF document text
    • 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_off0000dc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 17744 bytes
SHA-256: 3af83afb3b775399e72e3319212f4b1a38c69e60cf3c2aaa4ba3c1ef2ae1cf83
font_02_sfnt_off000121fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121FB 10944 bytes
SHA-256: 3ce757a0e62b3b9f3948756af8179da4c972cac7d81e33abdfcd7e53cf153754