Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03b438fefda7670…

MALICIOUS

PDF

115.4 KB Created: 2021-02-20 00:28:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 17750a743f8fd7187641a0cef14f0938 SHA-1: 4cf0197eab10174fd0d97d884caf3295e9a36b22 SHA-256: d03b438fefda76708c8b9c6432a9a547a2cd7dce5270973ecbe42ab300c276c2
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 high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely used to host a phishing page or download further malicious content. The document body, though heavily obfuscated, suggests a lure related to a 'guide'. No scripts were extracted, but the presence of external URLs and the overall detection profile strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=osamodas+guide+2019 PDF link annotation
    • https://cdn.sqhk.co/genopeno/jbP8X9u/fapulidipadezox.pdfIn PDF document text
    • http://zathkatow.xyz/digamozaruxoxadegurekowvm8tx.pdfIn PDF document text
    • http://mkuu.club/310267103786b0ek.pdfIn PDF document text
    • http://creditinquiry.info/pearl_of_great_price_parable_ldse18io.pdfIn PDF document text
    • http://yoga-fitness.space/beamng_drive_apk_for_androidxnwut.pdfIn PDF document text
    • http://korsabarca.com/gagerinisojuxupobudoxifevhswp.pdfIn PDF document text
    • http://herss.space/radio_shack_md-1700_keyboard_power_supplygbi1g.pdfIn PDF document text
    • http://dubiniba.iblogger.org/humminbird_motorguide_interference.pdfIn PDF document text
    • http://krokoboko6.xyz/rosetta_stone_spanish_answer_key_level_26sqjq.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
    • https://s3.amazonaws.com/natewared/django_jinja_template_tags.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/nexus_mods_witcher_2_tweaker.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/iis_url_rewrite_module_2._0.pdfIn PDF document text
    • http://palulofegag.rf.gd/winuxalenexoligogurakur.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/wilubisafil.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/52936752265.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/river_flows_in_you_piano_sheet.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_off00017d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D0D 5224 bytes
SHA-256: 4dd1de9c525271d05a1295c9cc965bb5506883de09e47ac284006cc8effadb97
font_01_sfnt_off00018ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18ED3 10380 bytes
SHA-256: 5a3da8a60a44e15098776a928e0aa4d59ca6f5d2df1ed60ee261a4bd55c80fe0
font_02_sfnt_off0001b229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B229 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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