Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed4c22cdae6d29b…

MALICIOUS

PDF

82.1 KB Created: 2021-09-12 20:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 5635a2dea89ba429fea7ac8563252f77 SHA-1: 80658d01b4e5ed1fa49e67790fc1e0cfab3d1bb3 SHA-256: 3ed4c22cdae6d29bd57e9ed593ba9ce34c0f183dbaa7e9462e29fbb34f33e1fd
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 0.9974

Heuristics 5

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=android+share+menu PDF link annotation
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319cb62a92b---xuwamupid.pdfIn PDF document text
    • https://inmaabiladi.com/userfiles/files/87130604523.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/jepadum.pdfIn PDF document text
    • http://heimundsicherheit.de/userfiles/file/lafipusasolenesoridapa.pdfIn PDF document text
    • http://edeins.com/userfiles/file/vemozojuvusobapagi.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/6153068558.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/xajixavobineterigude.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/82969547561.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/negusolijoja.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/fisulajubebeparikadipij.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/zesebegurubuzisokinax.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/22312857522.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/14833529671.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20210908_015550_154.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/85162883243.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/giwajolometuvapojexi.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161306585302cf---lazagupuwe.pdfIn PDF document text
    • https://lazeo.nl/userfiles/file/zevegekemus.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/24640283394.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/21402402547.pdfIn PDF document text
    • http://mislenyiallatorvos.hu/userfiles/file/xusisawonexugo.pdfIn PDF document text
    • https://lodoshosting.com/calisma2/files/uploads/resijogagejelefuv.pdfIn PDF document text
    • https://copyjokertw.aw6.tw/uploadfile/qu4_qu106_com/files/68092951053.pdfIn PDF document text
    • https://matagujrischool.com/admin/imagetemp1/file/3210641496.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_off0000dda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA7 17740 bytes
SHA-256: 800c168ce2c194d347d4b4d42fc34dcb29a03b8d278d67a44a35808e347cdb95
font_01_sfnt_off00010b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12355 10452 bytes
SHA-256: f315187db1ad673b59d4dd78d9cab793ffa4976a097699400a589e864187c9a3

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