Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02ffcee3dba9697…

MALICIOUS

PDF

69.8 KB Created: 2021-10-03 10:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 71a87e14ebd1745def409dedb912a277 SHA-1: bff12aecd121efc4b55c30380401b56c1ce9ef67 SHA-256: e02ffcee3dba96972d4a3182d12aaafee222ac42dfec52ecded413b901388999
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous external URLs, many of which are part of a link farm hosted on disposable domains, indicating a likely attempt to redirect users to malicious content. The PDF structure and embedded URLs suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://laborke.ru/uplcv?utm_term=food+the+chemistry+of+its+components+pdf PDF link annotation
    • http://nuk-amro.de/userfiles/file/9044954505.pdfIn PDF document text
    • https://bodymason.com/user_uploads/files/xavazudumafo.pdfIn PDF document text
    • https://kaskad-74.ru/images/uploads/wudamasevakemebutejevapu.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/dazexasa.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/rkemtams547e2nrhvej00ikqao/dalal.pdfIn PDF document text
    • http://futiandj.ntgis.com/UploadFile/2021/09/30/file/20210930_182921_151.pdfIn PDF document text
    • https://thailonghoang.vn/upload/files/jisetokubinapobafeg.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/68669841145.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/gisamewanujibafa.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/wuberowat.pdfIn PDF document text
    • https://widerbet.pl/userfiles/file/pulafogoboluwudoxado.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161588d8dae0e9---23811406545.pdfIn PDF document text
    • http://mapect.com/upload/fckeditor/file/64642007454.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/91593530474.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/88637528989.pdfIn PDF document text
    • https://dammesliepas.lv/ckfinder/userfiles/files/guropomiviwetexikamerafot.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/gixukivekexefe.pdfIn PDF document text
    • http://www.nbc.com.vn/ckfinder/userfiles/files/befewabukokajaforigojikuw.pdfIn PDF document text
    • http://letnaterasa.customreal.sk/data/files/nugunudefegogamuwoxu.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/153887600.pdfIn PDF document text
    • http://klusjesindex.nl/images/uploads/22651026643.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/bimiv.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_off0000b0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F6 15844 bytes
SHA-256: f085deeea929390eebc590be7f30db483881d3b602bb99d56b8f30967e653160
font_02_sfnt_off0000f0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BF 10768 bytes
SHA-256: 7160a988d4301bd5d6a33d1234cf848bb1e000b8a90f4caa1a216911d5cb1a11

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