Malicious PDF — malware analysis report

Static analysis result for SHA-256 710e41f6b1d512f9…

MALICIOUS

PDF

75.8 KB Created: 2021-09-17 09:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1d0e22fa4b55c6abc0cd52f59678fcd2 SHA-1: 9eff14468761bb27789f7584243f6bdceb726083 SHA-256: 710e41f6b1d512f9fcc67b5f46e3b7aaba49eb22c0ff68842eb0738366c5aac8
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, many of which point to disposable domains. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the 'SE_QR_LURE' finding suggest the document is designed to trick users into scanning a QR code, leading them to a malicious PDF. This PDF likely serves as a phishing page or a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://easypayindia.in/userfiles/file/rowulofixefipilejorib.pdf In PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/goniluxiwelubagijipoba.pdfIn PDF document text
    • http://kunmobile.vn/files/uploaded/20210909/file/busovazilo.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/3sphmk6p2c59cofdm2ufiqc4m4/83746797523.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/fifetulajukimenetadexo.pdfIn PDF document text
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/42447883604.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/fikolesuzufudog.pdfIn PDF document text
    • http://sdes.in/uploads/mifuz.pdfIn PDF document text
    • http://www.sunriseacademy.in/ckfinder/userfiles/files/52360014828.pdfIn PDF document text
    • https://asken.as/bilder/file/48730569649.pdfIn PDF document text
    • http://oumkua.com/userfiles/file/luxefejosotut.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/gugutu.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/deaecd1a335dc363d0670c69e201ce1f/nolenegig.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/84947229383.pdfIn PDF document text
    • https://profesa.net/userFilesfile/mezavepavubijikabed.pdfIn PDF document text
    • https://eminentland.com/admin/userfiles/files/21812169764.pdfIn PDF document text
    • http://vegman-kzn.com/ckfinder/userfiles/files/45933604941.pdfIn PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/munojijizonilisamodojazes.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/81898502109.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/83013959425.pdfIn PDF document text
    • http://nhac.ditimchanly.org/Images_upload/files/29747209657.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+scan+qr+code+in+iosPDF 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_off0000c4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC7 17556 bytes
SHA-256: b7a46099918f24a3ba49628544fa77219ae3dc7ed681c5e2a31c91a963e22cc4
font_02_sfnt_off00010a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A68 10540 bytes
SHA-256: 5bc5c60f0f563876615fe780eb4a75dd7bc996abcea820818ffa01354b63b404

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