Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b67ac8bc06d32d…

MALICIOUS

PDF

78.6 KB Created: 2021-05-15 12:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5d0e0e78b3d0f352a4edbea186a5c7f4 SHA-1: c060fb4679328231d3fb3754b83e08aa72888d73 SHA-256: 33b67ac8bc06d32db67df08cd2a7b6b49bc9cb9be7279030a183206164fa096a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/strik?utm_term=the+medium+is+the+message+meaning+quora PDF link annotation
    • http://lovelid.xyz/zalim_niyetleri_tam_film_ngilizcesyus8.pdfIn PDF document text
    • http://redtea.space/iskysoft_video_converter_ultimate_crack_free06bpv.pdfIn PDF document text
    • http://pshcomonhere.xyz/foundations_of_modern_analysis_friedman3sv2q.pdfIn PDF document text
    • http://vanlit.ru/nixuzikotewekaferojapirj7n8q.pdfIn PDF document text
    • http://testvvd.xyz/naduzeviwanewebodafovezozki8a.pdfIn PDF document text
    • http://healthytrands.com/good_turtle_beach_headset_for_ps4owhan.pdfIn PDF document text
    • http://dlkmvkoenv.info/flowchart_templates_free6ck4g.pdfIn PDF document text
    • http://ketotreno.buzz/charlie_s_angels_soundtrack_albumvx50q.pdfIn PDF document text
    • http://itsnat.space/how_much_does_starbucks_pay_employeesibqvs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c8c0226-2902-440d-abc0-03ca7bd4faf7/2000_honda_shadow_vt1100_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/656af1c7-2686-41a0-9314-6d139e6f52ed/20063784343.pdfIn PDF document text
    • http://taxonegak.rf.gd/isometric_views_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eceff6a3-2cae-418b-85c0-76f12b4ecc96/62509174117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a101a07-5a45-4826-86a8-f8454ae0d246/sharp_el_1801v_manual_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49868390-4df1-4d9c-b5fd-76e15a520fae/88184203108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/839b8bda-eb39-4c0c-8990-05ca1e1afdb9/gokosowus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdf0242e-3a71-4377-8017-9052cc7df6cc/starbucks_cold_cups_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff864a3-2298-4f7c-9a18-88cde599dee6/zavapujivixijulilabi.pdfIn PDF document text
    • http://wuguwusilabibax.epizy.com/factual_data_credit_report_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e91bbc0-4bcd-4835-88d5-cc3a01de55cc/lovufawa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF890 5284 bytes
SHA-256: b431281a0f674638d7c73b850070b08eceb72d2734e845d8979f2668dac58408
font_01_sfnt_off00010a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4F 10300 bytes
SHA-256: bd2f008e35db078269e7dcef1d1e918e5e19c05e47aef5d262841548290d21b0

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