Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b32e0bd327c72d0…

MALICIOUS

PDF

75.9 KB Created: 2021-02-13 14:23:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1d9879a48f777fd64ef2dbd8f474f00 SHA-1: 81d3b10a5ec97daa88f02ccf5759b499c4dbe1d1 SHA-256: 9b32e0bd327c72d01a65a90b2342c64739c810c3218ad81c732c9e59ff97ab63
104 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The presence of an embedded URI pointing to 'jacksth.ru' and a visual download button suggests a phishing or social engineering attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://jacksth.ru/wix?keyword=the+great+gatsby+review+packet+answers
    • https://cdn.sqhk.co/leporolino/eheQj77/lego_marvel_superheroes_2_deluxe_edition_switch_review.pdf
    • http://kaxunatinoti.iblogger.org/osteoporosis_guidelines_canada_2017.pdf
    • https://cdn.sqhk.co/tisufupujeli/je2hbif/free_ringtones_mobile_app.pdf
    • https://silajawa.weebly.com/uploads/1/3/4/3/134339193/sabukudese-baloxuvebe.pdf
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/jedoki.pdf
    • https://tumuzisokume.weebly.com/uploads/1/3/5/3/135351536/zasagekinogojidu.pdf
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/rupodotokinojetojar.pdf
    • https://bigadamedoje.weebly.com/uploads/1/3/1/3/131384249/gafakegufam-mafijatit-begoxugunawuvus.pdf
    • http://nefuzixitelu.iblogger.org/weight_training_program_for_beginners.pdf
    • https://cdn.sqhk.co/zekuxemelop/jJBgggg/artificial_intelligence_movies_2020.pdf
    • http://logemopi.22web.org/chrome_addons_apk.pdf
    • https://takoremitivo.weebly.com/uploads/1/3/0/7/130738963/meluwifagomejaged.pdf
    • https://biwewonopegad.weebly.com/uploads/1/3/1/3/131380063/mipuben.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gonidiwofove.epizy.com/negonakasanev.pdf
    • http://gezixerigalejeb.rf.gd/crystal_reports_13._0._21.pdf
    • http://desekipodepi.epizy.com/jaspersoft_ireport_designer_5._6._0.pdf
    • https://s3.amazonaws.com/levumoduf/receipt_format_in_word.pdf
    • https://s3.amazonaws.com/pisedij/dumejaju.pdf
    • https://s3.amazonaws.com/vavapekadoliti/77393414252.pdf
    • http://sipopos.epizy.com/28568366700.pdf
    • http://nemevefer.rf.gd/vukib.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5d7.bin
71ef541e8eb055cf38ecadcec1faf59d5832aff288f04169a24fa98dcec5eebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D7 5572 bytes
font_01_sfnt_off0000e8e2.bin
26e6091e4975beb43f85e92ec89f2d87e31eed4ed4a6fc724087175ce4fc9616		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E2 10556 bytes
font_02_sfnt_off00010d07.bin
8fb2621915dfc007ff2d0e30b281ceb029ddf1b64eebbf5d4dbd926fe97904ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D07 16144 bytes

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