Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34a6323fd7a6741…

MALICIOUS

PDF

83.8 KB Created: 2021-09-18 21:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d986e37ebebb01c9c5aee6b7ce3cc979 SHA-1: b78d1de9c2583ca68a6934597108c13fe5e87a05 SHA-256: d34a6323fd7a67413cb6ea2d9c8feb5fc88c1f52c8e67b924a615c781c440090
134 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution attempt. The presence of urgency lures further supports this conclusion, indicating the document is designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://garglob.ru/uplcv?utm_term=will+removing+sim+card+erase+data+android PDF link annotation
    • http://dc-3ed4d7413bdb.prshots.de/uploads/userfiles/1630695515/files/76176162399.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/xigikasomakukemuropomok.pdfIn PDF document text
    • http://sergeisurzhin.ru/ckfinder/userfiles/files/98335373086.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/jilerefelabim.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/rupewegamoxojafudijerizar.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/zogebasolotigomejeze.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/tekimin.pdfIn PDF document text
    • http://3sdent.com/upload/files/duwimulorukojiviwejola.pdfIn PDF document text
    • https://mots.alaxarxa.cat/cmsimple/images/file/bazepazugur.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613f152f2ccb4---kalosozibur.pdfIn PDF document text
    • http://dream-mebel.com/pic/file/kefuxesubekozogifuwoboten.pdfIn PDF document text
    • https://capital-publishing.com/ckfinder/userfiles/files/nofepejidemubap.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/7132648516.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/54845994717.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/logeleduvovo.pdfIn PDF document text
    • http://autowassenindex.nl/images/uploads/99248539844.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/vemizezik.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/supupozunabiwosuluranak.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/laxelidatitowitojenekesas.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/54709168419.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/deliteril.pdfIn PDF document text
    • http://blueview.nl/app/webroot/files/userfiles/files/goxopeju.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/zogolatufami.pdfIn PDF document text
    • http://corse.annuaire-regional.com/ckfinder/userfiles/files/63653502855.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/nolux.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_off0000e314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE314 10772 bytes
SHA-256: 219cb7bd2e626f524ae3a4e41964885f08488e88ae321a711c9a88d58a95db4f
font_01_sfnt_off0000fbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB1 17688 bytes
SHA-256: ed708fcf593125c3fa88467314c99d02587283c0a37a02ab37e4268b904edb43
font_02_sfnt_off00012938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12938 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1