Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e00b19be1b9fec5…

MALICIOUS

PDF

95.4 KB Created: 2021-09-13 17:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c1db7588cc2672a2a1da90d9a832c4e7 SHA-1: 909c0cafb2553785661a1c8cd31503ee28e22e43 SHA-256: 1e00b19be1b9fec56a20661c08545ef3cab82fac71cb5139b44bb63934a70484
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to PDF files, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript, though not directly analyzed for its payload, further supports the malicious intent of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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.
  • 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 https://dailyiat.com/html_upload/file/45525222302.pdf In PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/50358186461.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/53481199324.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/vagumewenamexabuwolov.pdfIn PDF document text
    • http://sccsfz.org/upload/2021-09/26010294278.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/kupilawo.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/pegecd4i2o2bbro1b62qlh05ms/8930827178.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/89908407274.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/damobewufutuvogujif.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/sebiti.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/mefamuxazaba.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/37054488063.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/waleda.pdfIn PDF document text
    • http://electronicaindex.nl/images/uploads/86454156165.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210904011548.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/guruloloburigirojevuje.pdfIn PDF document text
    • https://qeyeoptical.com/ckeditor/ckfinder/userfiles/files/luwologemujotaneke.pdfIn PDF document text
    • http://tianfonmm.com/d/files/pewapin.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/jatozelobolevumogavaru.pdfIn PDF document text
    • https://vinniescustoms.com/userfiles/files/82068117968.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/46832447797.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/nedefatuxenexalufidazi.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/fekoxitavebutajujomok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=highrise+virtual+world+mod+apk+2020PDF 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_off000104ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AE 11312 bytes
SHA-256: ee7c3e406fe2d007703373db39cd9aef02fb17e9ebe7011a301a02407cf624d9
font_01_sfnt_off00011f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13735 21292 bytes
SHA-256: f4f2888947f7ed9b8a2eef4aa8c1376a149e6f116d4b06cc0ce907114e9f8486

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