Malicious PDF — malware analysis report

Static analysis result for SHA-256 057b23e2d2899184…

MALICIOUS

PDF

72.3 KB Created: 2021-06-20 02:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3a459f096b224c4f58e14bf8bd8e3860 SHA-1: 57dccacdd6df62228d044393f6a251f95433ef1f SHA-256: 057b23e2d28991846bf2f9a4ec5f1c3af762b25b97235f7fb07fe772945b63c6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

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
  • 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://cdn-cms.f-static.net/uploads/4422372/normal_6060fb6d8ccb7.pdf In PDF document text
    • https://zimekepipo.weebly.com/uploads/1/3/5/3/135351260/9011192.pdfIn PDF document text
    • https://rumeravovavupol.weebly.com/uploads/1/3/4/6/134619367/mixut.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4386591/normal_60b1e6f4b5596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445864/normal_6009dbdb80530.pdfIn PDF document text
    • https://jojimixumomural.weebly.com/uploads/1/3/4/4/134438106/35afd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425760/normal_600d88f768135.pdfIn PDF document text
    • https://sudoxelavekif.weebly.com/uploads/1/3/5/3/135305243/lasejudakozukofozu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463803/normal_606e49e09e670.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/sq/ugae/~3/gPkW7oTCsL0/square?utm_term=sql+server+tutorial+for+beginners+pdfPDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60c463ba4db0245bdd741123/1623483323133/forex_arbitrage_strategy.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60c3fd324514102cb0d26706/1623457076881/htp_buck_manual.pdfIn PDF document text
    • http://poguvovuk.pbworks.com/f/how_to_order_avon_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/128dc1fe-fd18-4b49-b650-0c9a02660b40/lakukifan.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60c8dad8eb959e57f7421ecb/1623775961046/joint_business_plan_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60c7c208a429a3355d804726/1623704072347/drilling_hydraulics.pdfIn PDF document text
    • http://bamedun.pbworks.com/w/file/fetch/144631413/harley_davidson_electra_glide_trike_kits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c7298be-1d4c-49ce-8b37-873fe92f39ee/best_schools_with_international_business_major.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c6a79613f649bb1d090/t/60ce634d32da3f557a500bcb/1624138573808/create_minecraft_bedrock_server_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f99d22-6844-4b58-80c9-1ed25cfa0f05/hildegard_of_bingen_alleluia_o_virga_mediatrix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f720503-eb7a-4086-acbc-a0b16bb6b216/nj_1040nr_2016_instructions.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c6a79613f649bb1d090/t/60c982eb54181746828dfc84/1623818987324/lafelezubimeguteruxo.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_off0000dc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC39 5636 bytes
SHA-256: b6ff3cd2a2d8bb7780a44f7a5da458196f1c0f7d2321133d728750336f1e7cee
font_01_sfnt_off0000ef69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF69 10612 bytes
SHA-256: d9945e867a9998b719ad79aaf9426697addd188913f97c1b3e867a5a7698022f

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