Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a3428bc7c635cd…

MALICIOUS

PDF

215.2 KB Created: 2021-03-30 11:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c2dc3e2ce3712a2c112c040537b9694 SHA-1: d5eae2a11dff89a62e9cf44af960b0865e2f77c0 SHA-256: f3a3428bc7c635cd93a7ade4b17f51a78dd4f636a93ec725e5a2712f5ef17767
116 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The 'SE_CALLBACK_LURE' heuristic confirms the document's intent to trick users into calling a phone number, a common tactic in phishing and tech-support scams. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest the document is designed to exploit users through social engineering, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 5

  • 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.
  • 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://botokaw.ru/aws?utm_term=allen+carr+ebook+free+download
    • https://fuxomiluzixoxam.weebly.com/uploads/1/3/4/5/134594746/kerevilukanasu.pdf
    • http://redpandarecycling.com/android_emulator_google_play_services_not_supported9kzt4.pdf
    • https://cdn.sqhk.co/dufukeraj/cidrQhy/chennai_super_kings_roster.pdf
    • https://cdn.sqhk.co/teketerep/mhbgf6k/lodomoxevelagikit.pdf
    • http://gavazode.22web.org/andre_luiz_nosso_lar.pdf
    • https://jodawozuwiki.weebly.com/uploads/1/3/1/4/131437728/5843aa749.pdf
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/dunuwelivuten_lerobekidoluk_wefulovot_regorugajiw.pdf
    • http://lovepositions.info/651639958373nkgl.pdf
    • https://forerijekakifur.weebly.com/uploads/1/3/5/4/135401119/86634b3fbc8.pdf
    • https://wulukisogexoz.weebly.com/uploads/1/3/1/4/131438059/8817215.pdf
    • https://nugasoxitobaj.weebly.com/uploads/1/3/2/7/132710773/sujasolaj-xijavebom.pdf
    • https://cdn.sqhk.co/fedijadika/hcRichg/11969068328.pdf
    • http://euroshopmn.space/699980477285wnep.pdf
    • http://wavokumad.iblogger.org/love_feeling_hd_video_songs_free.pdf
    • https://cdn.sqhk.co/dopuwene/mV3ChgY/83829957498.pdf
    • https://wexivupesowapab.weebly.com/uploads/1/3/2/7/132712225/f5db890a564f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bejideba/39098858305.pdf
    • https://s3.amazonaws.com/xovajukoxin/gojumuwemowuzunedulivuge.pdf
    • http://mujujum.epizy.com/bleacher_report_fantasy_sleeper_picks.pdf
    • https://s3.amazonaws.com/numegubowalonan/free_full_credit_report_online.pdf
    • https://s3.amazonaws.com/fukepez/yowhatsapp_latest_version_7._50.pdf
    • https://s3.amazonaws.com/muvojugejoxip/site_reliability_engineer_salary_google.pdf
    • http://velawomonoxejuz.epizy.com/32838183854.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00031498.bin
561dbeb45eeff9fe2c12242c1589eeea7bc4e34940fc6083ca3a5b90f8672dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31498 5120 bytes
font_01_sfnt_off00032628.bin
ac3cb664487307552be0974a4d1baceb191a344ebf8acdab1e0cebbbc06f529a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32628 12276 bytes

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