Malicious PDF — malware analysis report

Static analysis result for SHA-256 08feaea4881b32c5…

MALICIOUS

PDF

73.5 KB Created: 2021-04-30 13:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 08e39f33540e1fbc196e4ba4a7201f2a SHA-1: 70ad5296289ba62c8f09033cfab69f7c9b33b77c SHA-256: 08feaea4881b32c5534f2daf39d9007d3e5bfb80fcfbca96e3ecc08f18c887ac
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to known malicious redirectors or disposable hosting. The primary purpose appears to be directing users to potentially harmful external content, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=maytag+maxima+xl+washing+machine+manual In PDF document text
    • http://limaxinsto.xyz/walmart_near_me_now_hours_todayt0hak.pdfIn PDF document text
    • https://wikivosunox.weebly.com/uploads/1/3/2/7/132741322/lerewori.pdfIn PDF document text
    • https://varepakizadi.weebly.com/uploads/1/3/2/7/132740548/gebuvabipop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385617/normal_5fd15b8bdd8cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449172/normal_60360dc86523c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473651/normal_60590fbe6ddff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5fea186ea1150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473041/normal_603cf94994fac.pdfIn PDF document text
    • http://ihsteam.ru/the_great_gatsby_vocabulary_chapter_2_answersosrc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_6041dc2445506.pdfIn PDF document text
    • https://bajurajatug.weebly.com/uploads/1/3/6/0/136054821/lasopobufitudif_rojagibisu.pdfIn PDF document text
    • https://sajixigepanosu.weebly.com/uploads/1/3/1/0/131070231/zejasirub-kijudopufifika-xifafewitusi.pdfIn PDF document text
    • http://familyit.pro/wuvifuxasidikinunigopumuxyy400.pdfIn PDF document text
    • http://socialwave.me/kodosaguzibaja5wnvr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_605303acce2f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_3b84d79194104dc0a865a13c932734de.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5912c36f-30fd-4ef2-aef5-8b558b38f708/digital_insanity_keygen_download_acid_pro_7.0.pdfIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_53bd551a30a84e9ba535de75825b0024.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be56a45-ad93-4f00-8e5a-be5b13f6fefb/vilapimavuluv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e082d76a-f26b-453e-9f63-be10df31c8d2/vefovekojoxojosupave.pdfIn PDF document text
    • https://d572dbd6-ec42-402e-884a-3db6daac2318.filesusr.com/ugd/6a558d_1c16d766b5b748c18c5d30d001e97ea2.pdf?index=trueIn PDF document text
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_47ad4bbafae5461c936bff2a7e33c307.pdf?index=trueIn 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_off0000e08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 5384 bytes
SHA-256: 04c335f2c0e9febb6a8a19f0932edbfc842183dfaf9eaec9dcf1966f6fc90234
font_01_sfnt_off0000f2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E6 10444 bytes
SHA-256: 9e0b2e29b104582af6b31e62506d8278a06c4832ae26f393a632f4b75d8fbbd5

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