Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb035e54f37d6d7c…

MALICIOUS

PDF

67.9 KB Created: 2021-03-01 00:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 80fafe2550880b603c256c21d15b4d4f SHA-1: 9f195f3c049b30197f225492ed00b5b73b15eb13 SHA-256: fb035e54f37d6d7c2a38799653bfc83d85a0cdddfb21372bb83d82aa4185c79c
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains an embedded URI pointing to 'golowaki.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The document body, though heavily obfuscated, contains keywords related to a movie title, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://golowaki.ru/award?keyword=maze+runner+scorch+trials+free+stream PDF link annotation
    • http://vpntop.info/republican_party_platform6mq48.pdfIn PDF document text
    • http://stnold.com/libro_de_periodoncia_carranza_11_edicionadzcg.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/Hgjjbgh/class_9th_science_ncert_solutions_chapter_3.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/chess_puzzles_mate_in_10.pdfIn PDF document text
    • https://cdn.sqhk.co/susotizakaxe/5idgc7Q/27795848233.pdfIn PDF document text
    • http://ibkreactiva2020.com/tamilrockers_tamil_dubbed_movies_20140uctp.pdfIn PDF document text
    • http://bandalet.club/toledyo2t7.pdfIn PDF document text
    • https://cdn.sqhk.co/dikizumi/jjjijYf/xobasuzowutuborelo.pdfIn PDF document text
    • https://cdn.sqhk.co/sulojumi/dQidggN/kopajitopibet.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/37eihiT/9739586932.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/mejobu/industrial_revolution_vocabulary_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/cadillac_xt5_2019_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/xolegedetoxunab.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/97597002206.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/79906313048.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/rafosafu.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/is_it_hard_to_study_data_science.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_off0000cca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA9 5176 bytes
SHA-256: 8fdd3f837008b408bac0bc424fb161a43833c2c9e14f02f25089acb78df403af
font_01_sfnt_off0000de2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2E 10692 bytes
SHA-256: 12c53745b3cb1f67641ecde6a08a02ebd2f50928ad8309a397b8172427396e3e

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