Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe934e9a6cf5eba2…

MALICIOUS

PDF

80.8 KB Created: 2021-09-13 13:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 52760de3fba529fafee721eb5d3ed763 SHA-1: 8cc08a946ba9988c761adffa9ed3d3da99027a01 SHA-256: fe934e9a6cf5eba258ab8fda89fe1440ff5a0d11517dd8a1435fb2f47bae8a27
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, including one identified as part of a link farm, suggesting a phishing or redirection scheme. The PDF structure and embedded URIs point towards an attempt to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=instagram+how+to+see+profile+visits PDF link annotation
    • https://grandhotelushba.com/userfiles/file/33460156166.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/72110648438.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/kewakipejes.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/44869364615.pdfIn PDF document text
    • http://micdelhi.in/userfiles/file/muduzapududowurupibe.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16136f62ac8665---vozepudaruxaxis.pdfIn PDF document text
    • https://aodaixuan.vn/app/webroot/upload/image/files/namuvokavonewupijov.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/44729396864.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/nobikevitu.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/13610189972.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/mesaxojefuzeniparun.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/fojatorarino.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/vowomidebunagowiwufopas.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210906_111711.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/romigadesovevep.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/zigigemuzafedixof.pdfIn PDF document text
    • https://ienter.bg/files/fuvebaroxepi.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/dizewapiwonevixobi.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/71257212816.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/vofanitomedamali.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/37143182604.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/58469514330.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_off0000d492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD492 18436 bytes
SHA-256: efa11b73d0449aaf85dc44195118fcfa3e9295483784d53011141651369b89d1
font_01_sfnt_off0001046c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046C 10908 bytes
SHA-256: 3bdb15655d45d0abcdcb11853f71568a49f30bc29595a1b633f49df8397e7ab0
font_02_sfnt_off00011d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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