Malicious PDF — malware analysis report

Static analysis result for SHA-256 cacbb0c1b825f010…

MALICIOUS

PDF

76.2 KB Created: 2020-12-10 08:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2a488f5a200074518e20b57f74bebe51 SHA-1: 6996e7820757176e93f399656a2aa298ff53764d SHA-256: cacbb0c1b825f010d98da3bcf3f3d34489463782f677d16741afba37a10b0734
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. While no scripts were explicitly extracted, the PDF structure and embedded URI point towards a phishing attempt.

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
  • 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://trafffi.ru/strik?utm_term=horse+boarding+near+mechanicsburg+pa PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378151/normal_5fc9dc0c8ee0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388598/normal_5fb4c28c33d50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_5fad82dfcc233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_5fb9f004687f7.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://uploads.strikinglycdn.com/files/40fb2c16-5684-4ed1-9640-f62375955570/wenorijub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a4a7b51-04c5-41da-83c7-cc4056e468d8/16187981459.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfb8f79c08c7f2b9ed985/1606220687953/76333247942.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/english_tour_guide_jobs_rome.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce4c5cc83faa584acfd0cc/t/5fd1b5d3871f8c6e595aebce/1607579097240/live_wallpapers_for_samsung_a51.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/mujabukisofatire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/197dcdc3-0912-4333-bc9c-baf406682524/46072696737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75fe25ec-2412-4936-9a41-232c3f96c2de/moto_g6_not_charging.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc659750a2757459b082a1f/t/5fc95af728c68e72b1e63024/1607031543836/lamesakubadigebibudow.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1923f7819f6264ddadc8/1606228260364/volos_guide_to_cormyr.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_off0000dbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB4 5360 bytes
SHA-256: e9b2f0d8aba71e1744e8eda45542bdda31c9876ad55fd60e212d065368aa4899
font_01_sfnt_off0000eda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA7 11956 bytes
SHA-256: 828642ab850a32df71ffc2ca85c305d9e62e25ea2f241343e955f807dbc11716
font_02_sfnt_off00011597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11597 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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