Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde66665dbd27ffd…

MALICIOUS

PDF

81.5 KB Created: 2021-09-12 03:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: f3195cfae8e97cdfbc36270a133e283b SHA-1: 4c9bcb4d5e221266d3b7374f05804f01ad1d6613 SHA-256: fde66665dbd27ffda253b1157c580dd107dfd14db0ee403325dea349cf976b5d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://dorrstrechy.cz/UserFiles/File/38595968036.pdf In PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/298caaa1e9d211b673fcd8b2a6d7de2b/kizodoxikubotu.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/fatabemexerefuzu.pdfIn PDF document text
    • http://phongthuydotho.vn/upload/files/fowigidu.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/gazikowobanado.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/tunefibosenof.pdfIn PDF document text
    • https://kawanmto.com/contents/files/wufigezotaxamifozeb.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/dubopeteborowolaro.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c713472ce---20083055407.pdfIn PDF document text
    • http://shopabrang.com/images/files/77741568248.pdfIn PDF document text
    • https://natyabio.com/uploadfiles/detomazuwozupesug.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/vonanezuzanexo.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/99733769979.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/55604755292.pdfIn PDF document text
    • http://nataliashishkina.com/userfiles/file/sijavalafigeg.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/bovefaxovu.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/35564956997.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/73964854737.pdfIn PDF document text
    • https://pindimana.in/uploads/file/vonemepo.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/kuzud.pdfIn PDF document text
    • https://processwork.archerhuang.com/ConImg/files/dalekaxudutarabuben.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/mitevoburopelopevoranoro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=lego+vidiyo+app+apkPDF 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_off0000db6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6A 18120 bytes
SHA-256: 05272cd7727372312cf8170b71a368bd64fac074b2ee71d15bfc75c49b296a53
font_01_sfnt_off000109b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B0 10280 bytes
SHA-256: 577099c5906175f08b845254f766cf003a8f52585d815736935859d64833d5eb
font_02_sfnt_off000120be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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