Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6f077855cbf7f1…

MALICIOUS

PDF

69.4 KB Created: 2021-03-13 14:26:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8fd5b52d5df39af11adff4852193532c SHA-1: a2f6dfe46150b20a58475306cd45bf83175a0faa SHA-256: aa6f077855cbf7f1f586f2db74c98e619c14b1e4ddf63443e4048b7b93564b47
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to a songbook, which is likely a pretext to direct the user to the malicious URL. The presence of embedded URLs and the high confidence of malicious detection indicate a phishing or malware delivery attempt.

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://jumiwimov.ru/award?keyword=cancionero+de+cuecas+para+guitarra+pdf PDF link annotation
    • http://scarcebook.com/canada_express_entry_application_formrgxum.pdfIn PDF document text
    • http://gudaziteta.22web.org/list_of_books_left_out_of_the_bible.pdfIn PDF document text
    • http://dopadogexegox.22web.org/is_lord_of_the_rings_the_greatest_story_ever_told.pdfIn PDF document text
    • http://gidilakapajuke.mywebcommunity.org/provinsi_banten_dalam_angka_2020.pdfIn PDF document text
    • http://pawusewi.sportsontheweb.net/22307754239.pdfIn PDF document text
    • http://fudazozotakaxal.mywebcommunity.org/16007513848.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/military_course_codeag9pu.pdfIn PDF document text
    • http://rating-bookmaker.ru/pigiviberibaxuzugunodosigzx7.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/adobe_after_effects_cc_shortcut_keys.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/miwunim.pdfIn PDF document text
    • http://alkim.xyz/72029579432cv5u6.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/what_is_a_normal_reading_on_a_fingertip_pulse_oximeter.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/figidireki/bimitopujarelulirof.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/excel_vba_declare_worksheet_variable.pdfIn PDF document text
    • http://gikiwajufekozi.rf.gd/28227843698.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/43858706495.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/auto_tune_8._1_vst3.pdfIn PDF document text
    • http://tosebimujuted.epizy.com/bafabepitovoxabalezoguva.pdfIn PDF document text
    • http://kelirifexobuw.rf.gd/business_administration_modules.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/32187143133.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_off0000cece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECE 5196 bytes
SHA-256: 76a1e5d44fab9228133a5e572bf426ebbdd8d6fbbce45b0688c06b5fb15eb90d
font_01_sfnt_off0000e084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE084 11672 bytes
SHA-256: 36b933a56fda76388e610419a84b5b0383df5de51b8801133a6e4f8b25f30797

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