Malicious PDF — malware analysis report

Static analysis result for SHA-256 5982c9f28e84f3c7…

MALICIOUS

PDF

73.1 KB Created: 2020-12-27 18:14:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7af185d26d9e76118642942efc2ef9bd SHA-1: 90cba5009276aa5e219c551748961c0c0c811975 SHA-256: 5982c9f28e84f3c7d79961bf026c647fbcc90720cae841f7040149d898360413
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, traffnew.ru, which is likely used for phishing or to serve a second-stage payload. The document body, though heavily obfuscated, suggests a lure related to a 'forum'. No scripts were extracted, but the presence of an external URI and the nature of the detection suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/strik?utm_term=compass+point+west+forum PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485176/normal_5fa90f344a6ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/67191860021.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/fixonowumonufof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e0ad82-9e24-4025-a97a-388db17bf19c/gilixivawapiwexi.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/bionic_woman_2007_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/attorney_law_lawyers_html_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2979998b-50f0-49bf-98ad-007044d22322/php_array_contains_object_with_value.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/dka_guidelines_uk_paediatrics.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/fair_work_australia_job_offer_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c723af62-9b39-4f76-af79-510571c14ffc/6001054656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6210eeb6-9176-42a1-b9f6-097b92c537a4/83897647399.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/manualidades_para_vender_paso_a_paso.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/alien_rage_trophy_guide_roadmap.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/traffic_report_m4_junction_13.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB83 5012 bytes
SHA-256: 4d7be0c88c210a027ff118952e8f8a14de6afa3ee3d42f38a66a13428bdc36ca
font_01_sfnt_off0000dc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC87 10992 bytes
SHA-256: 04244756d582f1c08c0d1838771e07ebcead59527944e75be5cb4d99c55e3f0c
font_02_sfnt_off00010231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10231 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15

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