Malicious PDF — malware analysis report

Static analysis result for SHA-256 97010f1b7cc127b2…

MALICIOUS

PDF

82.3 KB Created: 2021-05-26 20:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b27b0ac81c6d5cca46cccbc974d50c3e SHA-1: 9a75d980889887f537224488388af674cdbdb0f4 SHA-256: 97010f1b7cc127b244f686e4e327e6cde9a36d2f15c5a65fe3b5587a961e7074
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which are likely part of a link farm designed to manipulate search engine results or redirect users to malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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
  • 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://dafemum.ru/wb?keyword=pack%20n%20play%20bassinet%20insert%20only In PDF document text
    • https://static.s123-cdn-static.com/uploads/4413007/normal_5fc7155fa3348.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489724/normal_5ffd8045b1ad4.pdfIn PDF document text
    • https://poperetaro.weebly.com/uploads/1/3/4/8/134893078/silokidegom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456666/normal_602513563abee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481409/normal_605f3cef51177.pdfIn PDF document text
    • https://javogukurajukip.weebly.com/uploads/1/3/4/2/134235542/xogalagitowemi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501654/normal_6062ed406e72b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446930/normal_60197bec28321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393904/normal_600c7a2ae6cc7.pdfIn PDF document text
    • https://nasotatuji.weebly.com/uploads/1/3/4/3/134392375/xawefosixowafoziwolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450727/normal_6011022775c32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5fdc8a2f266bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451574/normal_6031674e23fff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467950/normal_5fdc1f64959a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371498/normal_606010ea8e798.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460476/normal_605aef3e9a172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388428/normal_60241e83df7b6.pdfIn PDF document text
    • https://nakofasojerurog.weebly.com/uploads/1/3/4/5/134592478/fanopa_kogedokiratuv_gepuragavabutiw_romujufafixoxo.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/3d41881f-b456-44a9-a174-a77dba5c6242/adt_scw9057g-433_battery_for_security_alarm_panel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a5ef33-0eee-4ad0-a1e2-c3537d9f2577/bijatogivib.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_off000102bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BF 5232 bytes
SHA-256: 175ed9affb1ba52f11cefd422d39be818651a699f88deb71bb242a73b8fd31af
font_01_sfnt_off000114a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A5 11300 bytes
SHA-256: b45eb5c4cbc021952472caff709148d98aba7c687eef221e4d96c5d5d4c27b51

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