Malicious PDF — malware analysis report

Static analysis result for SHA-256 037d367912364b8f…

MALICIOUS

PDF

297.4 KB Created: 2021-02-11 15:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2ca9179a14aeedc92b95cc4e79270bae SHA-1: 01e239968b5de14c509b3385f2a9829e7dcf74ee SHA-256: 037d367912364b8ffacee58419416338a59de4e85d57c7069274ef3aa02d1822
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of urgency and payment-related lures, combined with an external URI pointing to a suspicious domain. The document body, though heavily obfuscated, contains text related to reporting and securities, which is likely a pretext to disguise the malicious intent of the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9817

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://maypoin.ru/wb?keyword=reporting%20issuer%20securities%20act PDF link annotation
    • http://itdiscount.info/pierogi_kielbasa_sheet_pan3hrhf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496014/normal_5fcf8da1752ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_601bb086a7e32.pdfIn PDF document text
    • http://zakukat.iblogger.org/70254760467.pdfIn PDF document text
    • https://nogusuxewi.weebly.com/uploads/1/3/1/4/131438155/fofusuliranipe_monabamepil.pdfIn PDF document text
    • https://cdn.sqhk.co/fimegasaz/ZNojbys/22573138931.pdfIn PDF document text
    • https://cdn.sqhk.co/daguvemet/iciJA2U/vexofavoruf.pdfIn PDF document text
    • https://sewizafisebe.weebly.com/uploads/1/3/1/4/131437566/duvek_dosumituxut_zexuf.pdfIn PDF document text
    • https://dijibelusubif.weebly.com/uploads/1/3/4/8/134871127/9780945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_60187f8b9fee6.pdfIn PDF document text
    • http://gopubewigofopa.iblogger.org/wufitanosizewepo.pdfIn PDF document text
    • https://sugelama.weebly.com/uploads/1/3/4/8/134898925/5312268.pdfIn PDF document text
    • http://mazers.fun/591101244019h06q.pdfIn PDF document text
    • http://mydenverneighborhoods.com/adding_and_subtracting_fractions_like_denominators6psmb.pdfIn PDF document text
    • http://juilopkiretlo.ru/4737541663h3dxk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371013/normal_5ff0eb75887d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temomuduzuba.epizy.com/connected_components_workbench_software_manual.pdfIn PDF document text
    • http://pinamagowejut.epizy.com/aptoide_tv_apk_for_firestick.pdfIn PDF document text
    • http://daforewepon.epizy.com/98901231806.pdfIn PDF document text
    • http://xewenofos.epizy.com/please_help_answer_my_question.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_off00045f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45F96 5076 bytes
SHA-256: 30a8e24cb444e7fb286aeb3e10cde6060b2e1b42ae2b9ef401472f74f31012a1
font_01_sfnt_off000470f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x470F5 10976 bytes
SHA-256: 37cb79d5e87ba2faef68c31c907025ba1e6a6b864b1d70c46ba83b06b3b31151

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