Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df45681fa16bada…

MALICIOUS

PDF

68.6 KB Created: 2021-01-19 18:36:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b019bb88a886e8f4474f71d4faf05c0d SHA-1: 7dc8f24ec237f76d1f4652e3a146b56046916fc1 SHA-256: 6df45681fa16badae575a2e83de9e47f9d883b7895ba0edfe4818a6b40d1658e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting a link farm or a method to distribute further malicious content. While no scripts were directly extracted, the presence of embedded URLs and the PDF structure strongly suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://seumenha.ru/123?utm_term=south+chagrin+reservation+waterfalls PDF link annotation
    • https://nenizuve.weebly.com/uploads/1/3/4/6/134615173/powojikulo_ruperojawi_simajijopikavu.pdfIn PDF document text
    • https://site-1220161.mozfiles.com/files/1220161/cykler_i_metroen_nrreport.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470019/normal_5ff533a91c599.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418171/normal_5feb7704b71ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418370/normal_5ff05f5896dad.pdfIn PDF document text
    • https://cdn.sqhk.co/xetilibul/hgTbjf4/slot_machine_free_games_casino.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465257/normal_5ffc16c7c12ef.pdfIn PDF document text
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/saberipiv.pdfIn PDF document text
    • https://cdn.sqhk.co/guxuboru/jjjhjeQ/25770756912.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/fje94ge/homescapes_hack_ios_jailbreak.pdfIn PDF document text
    • https://site-1172860.mozfiles.com/files/1172860/feziveravezonivejo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458417/normal_5feefd8933210.pdfIn PDF document text
    • https://site-1177369.mozfiles.com/files/1177369/aruba_iap_103_configuration_guide.pdfIn PDF document text
    • https://sukizasatesez.weebly.com/uploads/1/3/4/6/134686833/e414f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369166/normal_5ff56929bc457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489713/normal_5fe76b995c0aa.pdfIn PDF document text
    • https://gasutasisewejiv.weebly.com/uploads/1/3/4/4/134403787/4392814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379034/normal_5f9b86cd62bde.pdfIn PDF document text
    • https://site-1172728.mozfiles.com/files/1172728/lamivazezo.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://s3.amazonaws.com/rezugekolaba/53619123129.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_off0000c2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A5 5280 bytes
SHA-256: cefb99a2f8410abbfb8e493a0073cabb0bf251969578a4742c49e73ea168c36d
font_01_sfnt_off0000d4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A4 9944 bytes
SHA-256: 09adb0a24ab238f34042ff56f6283f644253dae0cabf2692ad1f1d0692700ced
font_02_sfnt_off0000f6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BE 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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