Malicious PDF — malware analysis report

Static analysis result for SHA-256 84dc036573fcb4c7…

MALICIOUS

PDF

80.4 KB Created: 2021-05-11 02:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5243b03e763b0fcf7d09952bc44122b6 SHA-1: de45e0637366c4fc4fdb26c1300e81abe604fd43 SHA-256: 84dc036573fcb4c702ab096f665c6cf172ed05ee6acd964276382d4409a4f7c8
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to host malicious content or redirect the user. The document body, though heavily obfuscated, suggests a lure related to a 'shadow work journal free'. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=shadow+work+journal+free PDF link annotation
    • http://videohost.space/canon_mg3520_ink_absorber_full3e5wc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488346/normal_606454c9953de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470839/normal_605bbd73655b4.pdfIn PDF document text
    • http://instapodarok.site/why_is_my_foodsaver_stickymsjo7.pdfIn PDF document text
    • http://vovidumuf.22web.org/string_format_java_table.pdfIn PDF document text
    • http://stav-games.ru/jiruwonazesexujoroxiwe7y0ih.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_601a1cf183f0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jewuvebasabam.rf.gd/karnofsky_performance_score_ecog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b60c628-e288-40bc-a45e-a88e2f3df8d5/mozukolelolam.pdfIn PDF document text
    • http://guvenaverelud.epizy.com/cazadora_de_hadas_1_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/893008710.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/ligisojanagulepelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1baad2ec-763f-4ecd-9975-e774ea4964b4/how_to_continue_marriage_after_infidelity.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/11965415008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ab92fd1-7889-454a-bb09-d2075b4dadcc/79100442663.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/cnet_adobe_editor_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/faria_depth_sounder_transducer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b4f0255-2fff-42d3-9cde-1f89314947ee/stock_market_investing_for_beginners_book.pdfIn PDF document text
    • http://xukonepuwe.rf.gd/90623823586.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF026 4076 bytes
SHA-256: a31f09624760dd6cac15a328938330789211a8b4def2d6ab5612473bbc9fc5c0
font_01_sfnt_off0000fe6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6C 5152 bytes
SHA-256: 0ca503049d3f1bfba1ac9094c023acef409f801b7f628490c29264e251dd9765
font_02_sfnt_off00011004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11004 10584 bytes
SHA-256: 7931196d2ad4b98a6b06a913df2cc5efb753aa8791ea7a735e3d374d7c94ec24

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