Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d5899a44cc53c5…

MALICIOUS

PDF

76.5 KB Created: 2021-02-22 21:43:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b50d2a105ff7e5f64fb46dd67308f141 SHA-1: 5534a26aa59d37f1f91f6fe7ca1b596893b5b7d8 SHA-256: 79d5899a44cc53c570b086ad3e745f5ae33309004a1e4f92587de833fd0fc36d
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 URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body text, though heavily obfuscated, appears to be related to a book search, suggesting a phishing or malware delivery lure.

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://jottigo.ru/123?utm_term=the+birchbark+house+novel+pdf PDF link annotation
    • https://cdn.sqhk.co/bogovureg/hofjdy2/oliver_twists_mentor_crossword_puzzle.pdfIn PDF document text
    • http://gozatelaji.22web.org/vivemifikajevesiwesamen.pdfIn PDF document text
    • http://repair-planshetov.ru/cultural_heritage_categories8xl6t.pdfIn PDF document text
    • https://cdn.sqhk.co/mupalewefe/gqhihaZ/ultimate_battle_simulator_game_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vomikigiw/Q0igFjj/83605494904.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vojemigami.rf.gd/xeremelemilapodezasulagif.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/english_to_bengali_dictionary_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/pedibofukovuratebijib.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/95978124511.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/85916066480.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/34799047686.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/77201855719.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/75266170016.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/what_is_the_best_rub_for_smoked_brisket.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/171._excel_sheet_column_number_java.pdfIn PDF document text
    • http://wedutatitupaze.epizy.com/is_missing_411_on_netflix.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_off0000e121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE121 5260 bytes
SHA-256: d4914d18dfdef422e34159dacbf27519f0616089e185c57520efd5bd23320e41
font_01_sfnt_off0000f2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EF 10348 bytes
SHA-256: 93d871c18dadd62b9271fb210989a153c6c216206233ee48f59b4ae6d924f1df
font_02_sfnt_off00011684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11684 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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