Malicious PDF — malware analysis report

Static analysis result for SHA-256 5230be411b95f29f…

MALICIOUS

PDF

81.7 KB Created: 2021-02-22 20:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 3da710faca66663e07f022aa919c3d59 SHA-1: 2f50bb8dcf3aedba5a63dc0cf71a3f402e424a01 SHA-256: 5230be411b95f29f68838e319e6b5255e821cdb4beb091464326a39293fc1e2d
176 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or phishing attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document may also be designed to trick users into calling a fraudulent support number. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://bologen.ru/strik?utm_term=onkyo+tx-nr525+price+in+india PDF link annotation
    • https://cdn.sqhk.co/goronikel/gicVgdF/wedding_salon_internship.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418587/normal_5fd679db49d4c.pdfIn PDF document text
    • https://faxigokoge.weebly.com/uploads/1/3/0/7/130775726/wagofakotupevez_sulibez.pdfIn PDF document text
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/minidasudemabi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379959/normal_5fe8621c2e096.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/qicjea2/tips_dead_by_daylight_walkthrough_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/h85gjhf/funny_words_beginning_with_sa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468536/normal_6003ad5e179f6.pdfIn PDF document text
    • http://shoop-fe.ru/2348699697spjq4.pdfIn PDF document text
    • https://cdn.sqhk.co/ratobomebal/jeihfid/evowars._io_unblocked_at_school.pdfIn PDF document text
    • https://cdn.sqhk.co/korokotuduki/hldiaBL/tinkled_dictionary_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/ugcjdJw/rijemebisujapebanune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_6020b3185068c.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/zvpgeje/kejemomopulexobobabi.pdfIn PDF document text
    • https://cdn.sqhk.co/fivuwunar/hdTKigX/free_1st_grade_science_worksheets.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/penefelomiju/glacier_bancorp_annual_report.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF7 5192 bytes
SHA-256: 275b0e077bca35d5f0a2e118f02810c7dd62239f786df8af467e19c8c3c28192
font_01_sfnt_off0000edbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBF 11156 bytes
SHA-256: 3a3c38346e1aa1f319d806e9cef2846601009dd6c67c7e9a39f8d08f65ea4a2c
font_02_sfnt_off000113ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FF 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
font_03_sfnt_off00012916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12916 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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