Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a8f008a299cc20…

MALICIOUS

PDF

121.2 KB Created: 2021-01-25 00:26:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2501e828a15eef9d72f420ce793f7ba9 SHA-1: 26d493c2d181c864632131bdd4821cb42f589ec3 SHA-256: a6a8f008a299cc201138da52ac5bee80b1f7916d19a5944d4679984f8b839495
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'crophysi.ru', which is a strong indicator of a phishing attempt or malware distribution. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Dave chappelle parents'. No scripts were extracted, but the presence of an external URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/123?utm_term=dave+chappelle+parents PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426071/normal_5fceb03db8208.pdfIn PDF document text
    • http://oneshops.space/165265554509lbt2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424689/normal_5fe4f365648f4.pdfIn PDF document text
    • http://hookup153.space/dollar_hero_grand_vegas_police_hack_download5js8m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447626/normal_5fe7b03ddb540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465556/normal_5fd3d97ac9b60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412583/normal_5fd3928ea5c96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vufupu/bafg_folgeantrag_berlin_welche_formbltter.pdfIn PDF document text
    • http://gujupikisikali.epizy.com/disgaea_1_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/halloween_activity_worksheets_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/market_multipurpose_ecommerce_html_template_nulled.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/hannah_montana_forever_episode_guide.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C6C 4712 bytes
SHA-256: c569139c2de59d84461ff3a3fe7b5e1744596bf41179e9acbc234f4ee5f20c91
font_01_sfnt_off00018c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C66 11580 bytes
SHA-256: 461b3a575e301701f83cfb0f455d9a667baa974c19427a43df85b777350e6253
font_02_sfnt_off0001b437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B437 16068 bytes
SHA-256: b09879be15c6eb2246ae7b48c1c275502bdacda3194b2e7a150da035b49823e9
font_03_sfnt_off0001c8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8D1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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