Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c8bb21776fbdbc1…

MALICIOUS

PDF

73.8 KB Created: 2021-02-20 16:49:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 01951aab80d91317c16b03eda52cf6a1 SHA-1: 7243b11bd31a9326ebea0ce501ea75e0dc1d81b3 SHA-256: 2c8bb21776fbdbc18c6e30011756eedb95c0c1b558b859b27b1c639ef96863f6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the presence of external URIs suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

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://jottigo.ru/aws?utm_term=what+is+memo+and+its+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479942/normal_5fed1f9952dff.pdfIn PDF document text
    • http://winoraama.space/machine_element_design_notes82w00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484358/normal_6028fd38b172b.pdfIn PDF document text
    • http://apelsins.space/3304610904dp2o6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465131/normal_6000865dbdc53.pdfIn PDF document text
    • http://instasurprise.online/lebitoiqzun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469836/normal_5fef9c5777a55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_6027d4fc342ee.pdfIn PDF document text
    • http://mylic.ru/lazy_boy_power_recliner_repair_manualhb52f.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/V5Xrqie/crossing_church_quincy_il.pdfIn PDF document text
    • http://sexedate69.site/example_competency_matrix_templaterg0f8.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/Gujg0oY/78258372247.pdfIn PDF document text
    • http://navaram.online/67381347733auf6q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375884/normal_5fd9054ca8456.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469103/normal_5fc616aca98ed.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/faxaxos/55285317992.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/creep_movie_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/jive_ldap_and_active_directory_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/tor_browser_vpn_free.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_off0000e398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE398 5180 bytes
SHA-256: 878d677dbdd525003e7fa2d26a8ce78699a21562a3045e73af3afcc442dba3d1
font_01_sfnt_off0000f516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF516 10232 bytes
SHA-256: 85c0e818d811d81785507f64c9c0f2c75d663de643dc302082239f6e6a3455b8

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