Malicious PDF — malware analysis report

Static analysis result for SHA-256 918962b296319c7d…

MALICIOUS

PDF

91.9 KB Created: 2021-04-22 06:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 826a412c80e5fffdbb375936c3351935 SHA-1: 937fc822758657fbacc12fece359fedcd145807d SHA-256: 918962b296319c7d287693d5ed557dd34bee77f05d07639986eb78aa6f504e1e
116 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick the user into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were extracted, the presence of external URLs suggests a potential for downloading further malicious content or redirecting the user to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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://jacksth.ru/strik?utm_term=where+to+buy+second+hand+law+books
    • http://top-salez.site/minecraft_forge_1._13_windows_107404n.pdf
    • http://siteznakomstv69.space/aarp_wow_computer_reviewsca860.pdf
    • http://busforpay.online/how_to_turn_off_check_engine_light_on_1998_honda_accord13zdr.pdf
    • http://com-copyrighit.com/vananuzazivilejizop7go4.pdf
    • https://static.s123-cdn-static.com/uploads/4404515/normal_5fc67a0d8e86b.pdf
    • https://cdn-cms.f-static.net/uploads/4404285/normal_606e8233d32a8.pdf
    • https://cdn-cms.f-static.net/uploads/4411219/normal_605a79f6ea0ad.pdf
    • http://extraterrestrials.space/91995962220zk99.pdf
    • https://static.s123-cdn-static.com/uploads/4496811/normal_5fccb442d790c.pdf
    • https://cdn-cms.f-static.net/uploads/4463560/normal_60605d4226fa7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/toguvaju/bootstrap_table_data-_formatter_not_working.pdf
    • https://s3.amazonaws.com/jexijer/94158277259.pdf
    • https://c2963e02-5f2a-49ff-bb4d-22715b80ab3a.filesusr.com/ugd/55efe4_a6a6aef547e74b469854b787e2a1b089.pdf?index=true
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_306de34deaec43f4965f5c5986d38204.pdf?index=true
    • https://s3.amazonaws.com/waduzirader/cash_flow_statement_free.pdf
    • https://s3.amazonaws.com/betefowubevat/2677615229.pdf
    • http://kesitebogi.epizy.com/carboxymethylcellulose_sodium.pdf
    • http://tufuripisaren.epizy.com/sample_of_project_closeout_report.pdf
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_99be4ef58cea429e9f0ac9b6eb8838bb.pdf?index=true
    • https://s3.amazonaws.com/belopudevuzuza/professional_java_for_web_applications_download.pdf
    • http://birulapadeto.rf.gd/bright_line_eating_recipes.pdf
    • http://zumijuxuv.epizy.com/payback_period_example_problems.pdf
    • http://dotedofapi.rf.gd/bhagavad_gita_simple_english.pdf
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_023d30308a514aea887c0078406d872b.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001177b.bin
79762a028bbee0b54bb7d93cf39a8e110ece792cf9ab0dffc55b4a6a8e1c7903		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1177B 5272 bytes
font_01_sfnt_off00012978.bin
c71fe3f5ed46df6f6b927aa536992e327a6a4d7775853e0b170e01e7f6346276		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12978 11704 bytes
font_02_sfnt_off00015171.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15171 4324 bytes

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