Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ac20caa189de5f9…

MALICIOUS

PDF

73.6 KB Created: 2021-01-09 13:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 61e5c4f4f72552d1ade8c2ca15fc6249 SHA-1: d66ea0f29371ce7d03385de05f29c66b755160eb SHA-256: 9ac20caa189de5f99e1a2a666fbb624c127ec46e33cc3ffae37a23ff56810c15
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, and also detected by ClamAV. It functions as a link farm, containing numerous embedded URLs that redirect to external sites, one of which is a known malicious redirector. The document's structure and embedded links suggest an attempt to lure users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://traffking.ru/wb?keyword=piggy%20in%20carnival%20chapter%208%20release%20date In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5fac4cfc85218.pdfIn PDF document text
    • https://mugabezimezik.weebly.com/uploads/1/3/4/2/134235171/219082.pdfIn PDF document text
    • https://dubanivexog.weebly.com/uploads/1/3/4/3/134331992/momijakolokup_rufatonibuj.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/gipudoridakuva.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/8363686.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/luruwipamok.pdfIn PDF document text
    • https://vejazisiji.weebly.com/uploads/1/3/0/9/130969480/kofalepupakemimejixe.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/8745836.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://uploads.strikinglycdn.com/files/5cd7440f-2165-494a-a89e-a58d5403a92d/business_intelligence_analytics_and_data_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d709ebf4-2a69-4afd-9bf5-f7c4ba268586/loganville_high_school_softball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dac7416-7a6b-4e54-9322-4906600d76c3/18484069059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/770c42ae-b27d-4006-9eaf-8f8de9b4fead/hundred_years_war_definition_in_english_victory_site.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_off0000d007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD007 5368 bytes
SHA-256: ae84f3b5f69323d65f31e17bfdecf589525f40ff58224c1c8d19f5819f516725
font_01_sfnt_off0000e235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE235 12508 bytes
SHA-256: 30f37b5240e1efda1f50c4d10410c793e1c876b0106abddf50491e6b1be6f8f8
font_02_sfnt_off00010b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B22 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.