Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcca19be6bbb242…

MALICIOUS

PDF

78.7 KB Created: 2021-05-03 14:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 315e46288372f4b00cebebfc9cc20079 SHA-1: 2dd30c8e57d0a454f7fb5a9d9bbdcca94603ee91 SHA-256: 1fcca19be6bbb242dd2c04879794b1134cc0b61a9259113365b44da2ff845f8c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used in SEO link farms or phishing campaigns to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://baarspo.ru/strik?utm_term=simpson+3100+psi+pressure+washer+pump+parts PDF link annotation
    • https://cdn.sqhk.co/govizanorev/hgDcghi/globe_top_up_games.pdfIn PDF document text
    • https://kezagoguz.weebly.com/uploads/1/3/4/1/134131769/2691320.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/Fjahhhh/xiwugudev.pdfIn PDF document text
    • https://cdn.sqhk.co/nexoratuxi/ghhcjbN/listing_checklist_template.pdfIn PDF document text
    • https://mufejuraziga.weebly.com/uploads/1/3/0/8/130814984/verekilasuvumeroxedi.pdfIn PDF document text
    • http://lovelatu.iblogger.org/seismic_stratigraphy_applications_to_hydrocarbon_exploration.pdfIn PDF document text
    • https://zitidifomeki.weebly.com/uploads/1/3/1/4/131412181/1588446.pdfIn PDF document text
    • http://belixawotid.66ghz.com/black_and_decker_20v_cordless_hedge_trimmer_review.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/myibmgh/32874183911.pdfIn PDF document text
    • https://dewubolisevibe.weebly.com/uploads/1/3/4/3/134318954/785fa887f47.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/hcr5ahd/fastmed_urgent_care_wilkinson_boulevard_charlotte_nc.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/lekelepowo/what_is_the_moral_of_how_the_grinch_stole_christmas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/813faad8-5d1b-4105-a12b-1dfce4c6c6a1/funabiwulafulu.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/vcloud_director_9._7_administrator_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67431e20-84ce-4585-b950-57491cbaf9d9/dudumunaxad.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/lefugitevipix.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/90125055449.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/base_rate_bias_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28154eb4-8438-4865-9718-a4dd7b75ccec/tozunudin.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/55551682663.pdfIn PDF document text
    • http://vowefaxi.epizy.com/research_ethics_approval_form_example.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/jusaronasidovid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad82dd11-2a28-4ae5-9469-99ae0477036c/jawbone_speaker_bluetooth_pairing_instructions.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_off0000e6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AF 5460 bytes
SHA-256: b13db642865b7aaa71ed5c773410c2625de65168204c706822bcc8bd56d50ba1
font_01_sfnt_off0000f919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF919 11092 bytes
SHA-256: 850024eeb3e3cf829494dcbfc07d2c5f12bdd7a2059a5772c8ad7ddc79dfbba0
font_02_sfnt_off00011f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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