Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc6aa1bf548d087…

MALICIOUS

PDF

63.2 KB Created: 2021-01-30 06:38:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6545b693edaae1fa215823528de91930 SHA-1: 3f32e053bb5e0f5de999415c74631285b4648df2 SHA-256: 3dc6aa1bf548d087dc2a679f119e436a23f2ba6923407b6716232a0138fa368c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. An external URI pointing to 'baarspo.ru' was extracted, suggesting a phishing lure disguised as an annual report. Although no scripts were explicitly extracted, the PDF structure and the presence of external URLs indicate a potential for malicious content delivery.

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://baarspo.ru/aws?utm_term=annual+report+of+ibn+sina+pharmaceuticals PDF link annotation
    • http://eyebrowthreadingdallastx.com/new_word_games_for_iphoner4tz4.pdfIn PDF document text
    • http://negeduji.66ghz.com/vistaprint_retractable_banner_template.pdfIn PDF document text
    • http://national-verifyteam.com/adhd_medication_guide_20194fne4.pdfIn PDF document text
    • http://kufigada.22web.org/contractions_grammar_worksheets_free.pdfIn PDF document text
    • http://lastmarkt.ru/motogp_results_aragon_20188geky.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/tugumeb/html_attributes_list_bangla.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/4057844751.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/loxovuleda.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/sakideromowelowure.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/ganulemovukibumimope.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/online_bookstore_website_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/sugipifusamobube.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/taiwan_visa_application_form.pdfIn PDF document text
    • http://tukuponuvul.epizy.com/mobile_bookkeeping_app_4._2._4.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/redulejuwiwotoru.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/wejut.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/nightmare_creatures_pc_game_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD5 5384 bytes
SHA-256: 2167ce69768dcfce51742869ced4fda0c9120fd4b88ae229d961f9a6f0853e04
font_01_sfnt_off0000ccfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFC 10116 bytes
SHA-256: b19b471d8cf635f166593a9bddc288c94b53cec6c5856daf6bd430b96d1139c0

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