Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2add93ee7f55cea…

MALICIOUS

PDF

87.2 KB Created: 2021-04-07 23:12:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ccfe876da3677f30e94192eba5e0319b SHA-1: 67fff36fab8ae1f8f01135de33b23e24e95d4e98 SHA-256: a2add93ee7f55cea8d41996dad81ee380392d9676cc5588fcb4b3bd8a9e1f040
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 critical ClamAV detection and an ML classifier, indicating malicious intent. An embedded URL points to a suspicious domain, likely used for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'Avery 5163 template publisher' and 'wkhtmltopdf', suggesting a lure to a fake document creation service.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://soxebez.ru/123?utm_term=avery+5163+template+publisher PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417648/normal_60000e23c5fea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424951/normal_6067225ee550f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476272/normal_6032b31400497.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457876/normal_6008a23d26dc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386591/normal_604cf1192bad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485446/normal_603b6de2284ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386829/normal_601823b4d27fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466368/normal_5fe6fab542e5b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d170a353-ed13-404d-8de7-142d4273a1a1/rubexudivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0026ce-535c-429d-9b41-18484bcfa43f/mijuravofotapiguwak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5caa5d9e-c397-442a-8f44-84cdcc509be0/best_quotes_on_honesty_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1350866-5e02-47b4-8f5c-ee2e7d4c73e8/water_margin_slot_game.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/adverb_form_of_angry.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/papesixufe.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/fomezilumuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b774e0d-f0bd-40f0-91a4-65c0d4aba5ea/craftsman_wet_dry_vac_attachments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fb43686-c701-434e-8762-807da4435b71/73841858252.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/free_vpn_app_android_china.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/tisarutujogimomezuj.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/grammar_quiz_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f95b4674-880c-4cc4-a3d8-f3c3222d27b1/nazm_hikmetin_iir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db96359b-f74d-4c8c-9d12-1e825d4c4b49/psychoeducational_group_topics_for_substance_abuse.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/sejarah_kota_bekasi.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/fluid_catalytic_cracking_science_and_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/easy_veggie_indian_curry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ee2e9c3-b6d5-41fc-a66b-2611df85f528/89482166386.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_off00010ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC3 5844 bytes
SHA-256: 47c46ba928e8046447ff874f26fdd3e624be959b92e929672a6fcb5871fe1f60
font_01_sfnt_off0001228d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228D 12872 bytes
SHA-256: c26612d506f41249386c1ac4c3b3aa27972b2ba462c05d537ac8e1385e274d8d

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