Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c59dbc095f7d206…

MALICIOUS

PDF

70.6 KB Created: 2020-11-14 00:11:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d2622a19834d7df0f1aed6174e0a2fee SHA-1: 15e3676c655a6687de37262821a944eeb1eae640 SHA-256: 1c59dbc095f7d206ebfa07b1300a8152ff4e5c0957475aa8c406ea3ef247670e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malware delivery mechanism, likely initiated via spearphishing attachment.

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://traffnew.ru/strik?utm_term=data+mining+ppt PDF link annotation
    • https://sefufomoxuve.weebly.com/uploads/1/3/4/5/134528328/vozanegefuwebi.pdfIn PDF document text
    • https://fudukonuxevefez.weebly.com/uploads/1/3/4/6/134606022/wuzutilasodimilub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f8716b4ebec2.pdfIn PDF document text
    • https://xepebujusu.weebly.com/uploads/1/3/4/3/134319702/pokukuf.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/5fadf1b0-70fd-44fd-8d99-5f2b3c839a1a/82980380951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d33470a4-c6d4-4f42-835e-3e8ef3ddfe69/lavasagozubuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/business_development_report_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/55853778823.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/59712227697.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/women_s_attire_for_formal_wedding.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/virtual_connect_flexfabric_cookbook.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/fredbear_jumpscare_fnaf_ucn.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/affidavit_example_form_i_751.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/6975127663.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/zowalofurenoni.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_off0000d9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D8 4832 bytes
SHA-256: eb8bdcb0e372ac7241c60ffad855b6b90937646c8fef5f51023c0c7ebcc1bdc9
font_01_sfnt_off0000ea46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA46 10668 bytes
SHA-256: 5efe28889ab98c52cb58815d3bdff312982c7ddb12ad84bf98f8f50d07a80388

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