Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce68cb8f3a77c8d…

MALICIOUS

PDF

82.3 KB Created: 2021-02-18 21:51:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 15966df99e0a1aed40ab17336831dfb7 SHA-1: 93ff4a8f87725a3eae542fa5679b15f35bff3bc3 SHA-256: 9ce68cb8f3a77c8d1d8a698ce56b1d99326a9f6b3f7da8521d2ecccf855f9fef
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which are SEO-optimized and point to benign-looking documents, suggesting a link farm or SEO poisoning attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number for a fake support or billing issue. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of numerous external links and the callback lure strongly suggest a phishing or scam operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=how+to+use+noco+genius+10+battery+charger PDF link annotation
    • https://cdn.sqhk.co/wujozuzewed/ljbXjdY/brave_frontier_dual_brave_burst_pairs.pdfIn PDF document text
    • https://cdn.sqhk.co/topazawu/hghdqvq/42411208444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405651/normal_6019c6d1a3b0a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455179/normal_5fcce4ca252df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494417/normal_600cad2f9600d.pdfIn PDF document text
    • https://cdn.sqhk.co/lawikuto/gcjjbha/76357879787.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/hdI1p0i/surprise_eggs_for_toddlers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408976/normal_6009d86687567.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417830/normal_60230f687cc66.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/nuzedibubazuvulo.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/cOerwjd/20513583566.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/jolunenafobuw/free_quilted_bag_patterns.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/4526056135.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/4680181876.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/chammak_challo_dj_nyk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/condyloma_acuminatum_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/chinese_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/bad_mouth_season_1.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/fodipi.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_off0000f8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AF 5400 bytes
SHA-256: b68a509abe4ecc6c4aa82ffd946ec1deff3b8cf47ea0b91b047b3ef5ba2def2e
font_01_sfnt_off00010b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1C 10184 bytes
SHA-256: 0af563ec7447fde4da5fef6bc487bcd25865be37e85a90e2b755c26ab98bc844
font_02_sfnt_off00012df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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