Malicious PDF — malware analysis report

Static analysis result for SHA-256 97043e89f2276dca…

MALICIOUS

PDF

73.7 KB Created: 2021-09-20 09:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3df634144ea300667209c7ff08c13dde SHA-1: 712baf646f3ed225a74f2b767e6e44d24021905e SHA-256: 97043e89f2276dca3ccaafe964abb69992a94b2ead69318fed065847e126b0ba
142 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, with one heuristic specifically identifying it as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution. The presence of a visual download button further supports a deceptive user interaction pattern.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://swaving-stalinrichting.nl/ckfinder/userfiles/files/dafepijiwagixame.pdf In PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/mixoluto.pdfIn PDF document text
    • https://fluffy-chins.com/images/file/votikalele.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/55610900383.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles/file/60120725710.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614029518a42a---sanajasawobi.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210920051708.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/mafujigo.pdfIn PDF document text
    • https://hssanesteban.cl/files/sijuk.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/xavoto.pdfIn PDF document text
    • https://mariapolis.es/ckfinder/userfiles/files/vazexisipavebapixe.pdfIn PDF document text
    • http://firsttimehomebuyerstudy.com/images/file/44040330815.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/xopabosujimodirevixinixel.pdfIn PDF document text
    • https://fallsplat.se/bildbank/file/gevumawap.pdfIn PDF document text
    • https://lordoptika.hu/files/files/sufofusirit.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/rosinewexewebeweni.pdfIn PDF document text
    • http://tahyuh.com/uploads/files/202109052129304991.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/24437446925.pdfIn PDF document text
    • http://findingthegrey.com/userfiles/file/wuzejifalexag.pdfIn PDF document text
    • https://hijaulumut.com/contents/files/20633511567.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2abc6296b---26541592636.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=john+wick+torrent+magnetPDF 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_off0000bbeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD402 10632 bytes
SHA-256: e438b7dcfb5136f54147d647f7b87f21e53443b5e098e0081b24e618acd2fd83
font_02_sfnt_off0000ec46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC46 17588 bytes
SHA-256: 330ccf818d6ac8f9c72d8cf25548206bbe4fa190776f1ff19f00a0ee1b1ff45b

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