Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddda78496ca3e6c…

MALICIOUS

PDF

105.1 KB Created: 2021-06-28 23:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 55b0967ad18dafbbc845c3deafe64dab SHA-1: e2d32e878e8aadfffdbcf278ccc4c0ae200798d6 SHA-256: 6ddda78496ca3e6c5941df88a4892b236dbf3f90d344b795d466947a76272103
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF document contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or scam campaign. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to trick users into paying fees for non-existent prizes or parcels. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://oniceh.ru/uplcv?utm_term=shrimp+scampi+with+orzo PDF link annotation
    • http://jatyn.cn/upfiles/202106/file/1624408497.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c60ce9eb3d0---wekomok.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/fakidojidaxilikezav.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/23533922311.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/revabisagabu.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/c071dc7a6ace7832144f939bb031a54f/86681496864.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608358c07198c---65512325198.pdfIn PDF document text
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/17587046837.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/4949811b2cd67140db232b2c652a6aff/vadijijexudavexuv.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/4d440d240b1d8580825c77d3a9154fb2/limalolujivesijuguwumob.pdfIn PDF document text
    • https://atl-50.com/files/file/zufikunavavisix.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/31686760279.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072890a2577e---furunesunijawamoxizafewug.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210617213309_850414198.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16074723e9506a---33812278949.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/881267421.pdfIn PDF document text
    • http://insureatkk.com/ckfinder/userfiles/files/tupapujit.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dhqfjgts9u4jnchouiu86a5jd7/92218074924.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/5760135270.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/97464119234.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a89d98cfa---zujusukajodigonoxevupimo.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ul4u7td6tq9lr35huv6ec69nm0/69206497351.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1606f49117ceed---96923788707.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_off0001374a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1374A 10576 bytes
SHA-256: 52c6e679a05fc6319c5b130d6b723a96273479a52d983763d52b582a8cc6d396
font_01_sfnt_off00014f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F8B 18092 bytes
SHA-256: 4161efe93bc83f3d160fe41b20bbc32e8b4393b55f9d5349f526e6489830964f
font_02_sfnt_off00017eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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