Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafea0122e7991aa…

MALICIOUS

PDF

77.7 KB Created: 2021-05-08 11:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a34bf03eed236a20499a19d525eed69f SHA-1: ccd41cf3cb037222dc1187d2cb98b8d46eb4a84a SHA-256: bafea0122e7991aa58e1a3dcd06505f5e93cc6b3074fbabc83a39012192a9130
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, specifically as a phishing trojan. It contains a lure related to 'what a daughter means to her father quotes' and redirects to a suspicious URL, indicating a phishing attempt. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=what+a+daughter+means+to+her+father+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470837/normal_600e21ad7f7b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371025/normal_6005173c086d2.pdfIn PDF document text
    • http://lumejaramelu.mygamesonline.org/vetikiwuwax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/best_books_for_real_estate_agent_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355731fd-37cc-433d-882d-f5be38ce7e15/nupise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84f66ac1-114f-4aad-a703-c8112c3498a5/85180225898.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/posewubanutazuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/mixed_fractions_addition_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/hair_cutting_images.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/digital_marketing_manager_salary_san_jose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a28b585a-8ad3-4f4b-b61e-536464e071a6/38895221316.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/18951969812.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/xazerox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88de320e-7fe1-4f34-877a-a62bfe00ea95/which_app_is_best_for_learning_korean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d04db6-4a0f-4311-84e8-eeda98caa7f4/python_set_add_all_elements_of_a_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95095c7d-37e9-42eb-82e0-606158408bdb/38437861585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9a4865b-d98b-41a9-8c05-fd00b6bd6b19/dark_souls_1_4_kings_location.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_off0000f42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42E 5428 bytes
SHA-256: ba8d83021973b804b97b04bd61139e84ea79aeafad921762fc34ffaf352437ea
font_01_sfnt_off00010680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10680 10312 bytes
SHA-256: 5a39b73bd03262cd45035fbe1cc2753f65b0e950b930deee569e4219775a089d

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