Malicious PDF — malware analysis report

Static analysis result for SHA-256 0062e3c2a04a572f…

MALICIOUS

PDF

85.4 KB Created: 2021-03-17 19:50:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ed867d4864bd2732fef637999fe46c5e SHA-1: b87a915637a30c7fe96688e72d20b4e56aa8a2ee SHA-256: 0062e3c2a04a572f42cc8bc41f67e808cd85601dbf955022bdce708f6c018b5d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to a domain associated with link farming and SEO manipulation. One prominent URL, 'https://pelibifir.ru/award?keyword=ansible+tutorial+for+beginners+pdf', suggests a lure to disguise malicious intent. The ClamAV detection and ML classifier strongly indicate malicious content, likely a phishing or trojan distribution attempt.

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://pelibifir.ru/award?keyword=ansible+tutorial+for+beginners+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486523/normal_60436b1099155.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402707/normal_5fec8ff5afc6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381980/normal_6042fd7a14bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470839/normal_60491dc0a1fa2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471081/normal_5fe17b639ed2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387932/normal_605203100e527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_603fca8cc4d86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/hubspot_marketplace_templates.pdfIn PDF document text
    • https://f8ba888e-8f71-4fde-8303-550399648f4e.filesusr.com/ugd/17ce20_6692305d17b342d084d5df1fe8c87e32.pdf?index=trueIn PDF document text
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_796dff89e0c1457bb5a77d6c35a0076f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/namop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d19fbc-9036-4c2a-b720-9d8a938db92f/graco_duetconnect_swing_instructions.pdfIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_a54e833651f146b4b6bb58c89a4b66bf.pdf?index=trueIn PDF document text
    • https://69f6cc44-9198-4e41-bafa-43503dba92bf.filesusr.com/ugd/dec231_aa327fbae2434152bafa1f9fbf501466.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/what_is_youth_culture_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/abingdon_house_school_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4206d75-2b7f-49fb-97f4-1ae686a6cd22/riromedip.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/mepodizagit.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/kadexigodasenaponevebolum.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/retirement_planning_worksheet_canada.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_off00010bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCA 5336 bytes
SHA-256: a1c3635101f1bb4c66afa2c51b232b0088406ef2d8a93ab5abacdc0318fe1314
font_01_sfnt_off00011dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFB 11772 bytes
SHA-256: c15b818fb1e76c268c07b3f44d2792da8d472a8a8433040d42535e35aa6396ca

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