Malicious PDF — malware analysis report

Static analysis result for SHA-256 c417aeaf9f91fc6f…

MALICIOUS

PDF

67.9 KB Created: 2020-11-13 13:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e9c118b4e6d3e6ecd90ecc89270ea4a9 SHA-1: 144c68ab5680caa9bd5f9421726b91199a636dd2 SHA-256: c417aeaf9f91fc6f6ae569e8df5849dfb599d0048c7265edbd8f55e00c4866bc
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure and others forming a link farm. The presence of these links suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for phishing or malware delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=university+of+northern+iowa+spring+break+2019 In PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/jimipegiwovug.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/1865165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497370/normal_5fad8b9a7d6a3.pdfIn PDF document text
    • https://xudaxeja.weebly.com/uploads/1/3/4/3/134339900/fc90c542a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5f8f73534ee3b.pdfIn PDF document text
    • https://mulovepo.weebly.com/uploads/1/3/4/6/134666579/jivozumugobamexuvidi.pdfIn PDF document text
    • https://bakukumi.weebly.com/uploads/1/3/4/4/134437371/jabedilubafoxu.pdfIn PDF document text
    • https://kisuwirabavaruz.weebly.com/uploads/1/3/3/9/133999170/begonag.pdfIn PDF document text
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/60b55212bab2b67.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/mijedusovineti/waxax.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/flinders_university_au.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/the_master_and_margarita_by_mikhail_bulgakov.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/modern_american_mah_jongg_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/53207319837.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/cat_tourniquet_holder_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/573_area_code_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b6bbfec-362d-496f-9eb2-be654906370f/90761869771.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_off0000c9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B0 6064 bytes
SHA-256: 2648491aac418ae675fba78c78cf098ff91c47aef49adbe284d834969b8c6740
font_01_sfnt_off0000de6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6F 10528 bytes
SHA-256: ab9504709ed39a7ffb53970aa4bb7cd137900b6cbdf7117d3bb8dfd837d0a587

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