Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee5676ab3b72802…

MALICIOUS

PDF

70.7 KB Created: 2020-12-17 14:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8d581e876d2a5b50c6e2fa6d5ce4ad98 SHA-1: 7a44ca37b48f6f909fd0df89b422109140e4ef79 SHA-256: 7ee5676ab3b72802f81046e308ab20613b0e7af4a2dea6adc280227f1ae07da8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1059.007 JavaScript

The sample is a PDF document flagged by multiple heuristics as malicious, specifically for brand-impersonation credential phishing targeting Instagram. It contains embedded URLs, including one pointing to a Weebly subdomain, which likely serves as a redirector to a phishing page. The ML classifier and ClamAV detection further support its malicious nature, indicating it's a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://nevonanopovew.weebly.com/uploads/1/3/4/3/134335048/140047.pdf.
  • 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://traffnew.ru/strik?utm_term=briefly+discuss+the+five+moral+dimensions+of+the+information+age PDF link annotation
    • https://nevonanopovew.weebly.com/uploads/1/3/4/3/134335048/140047.pdfIn PDF document text
    • https://memefuzagimo.weebly.com/uploads/1/3/4/6/134612336/junebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f99a34b45cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f873fa89bc1e.pdfIn PDF document text
    • https://fujolununepa.weebly.com/uploads/1/3/4/6/134683680/497266.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426688/normal_5fca55a1277d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417834/normal_5fa8718ed846a.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://static1.squarespace.com/static/5fc3b1150b6b03258f46d597/t/5fc5b3a21972c46e3c6406cf/1606792099958/olney_elementary_school_philadelphia_pa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfb17d334513fae41fd2d/1606220567742/zugigowuvotuguvibigo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc673d711f6a41984abc1e0/t/5fcf4b4e3fa051062b444f7d/1607420753181/kezawufu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c43aa87939686407a428/t/5fc1712d08845d0924c11d89/1606512943053/jijawulumidopebewi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65808403f5353fdbaadc9/t/5fc80a90d6b05e265280188f/1606945424376/noriwojokuvalijapesid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce397f4e85dd6b25168a85/t/5fd65881164d0f203c79ff7b/1607882883048/zapelexulezetinofavibat.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_off0000c8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BD 5528 bytes
SHA-256: cd409aabdb86f814e1a104571128f479f31bb0600f37d843b1c0c2892e4a7630
font_01_sfnt_off0000db6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6A 10504 bytes
SHA-256: 33ee394fe69e381dcad3713748e8f65aa95ca0c8fef20d7b451a4143b56f61ab
font_02_sfnt_off0000ff1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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