Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc146284a2a1b4e…

MALICIOUS

PDF

72.0 KB Created: 2021-02-13 12:27:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fe23a045bc4bccd13b4b57ecdfaaa2b7 SHA-1: b06276ee5d2823a1c80e0d81a76af7c6f7fde40c SHA-256: 7cc146284a2a1b4e561674154854774bb0dd6c0f6c4adba24093dc218fff4b6c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of links intended to drive traffic. The document body, though heavily obfuscated, contains text related to 'Pizzazz math book' and 'answers', aligning with a lure to disguise malicious intent. The presence of multiple external URLs and a high ML classifier score indicate a strong likelihood of malicious activity, likely phishing or malware distribution.

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://jottigo.ru/wix?keyword=pizzazz+math+book+b+answers PDF link annotation
    • https://cdn.sqhk.co/pibexezases/ifiiOgf/ballistic_missile_defense_review_report.pdfIn PDF document text
    • https://diborukokaw.weebly.com/uploads/1/3/0/8/130814192/3b739a2928c9.pdfIn PDF document text
    • http://dreabling.online/ejercicios_de_numeros_cuanticos_resueltoszi632.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/9QwgjNs/jevipupiguk.pdfIn PDF document text
    • http://dedotiroviwef.22web.org/prophylaxis_endocarditis_guidelines.pdfIn PDF document text
    • https://jidupedepinamup.weebly.com/uploads/1/3/2/6/132680921/cf0146f3449.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/nuselufuzo/gafefexuvifetowiz.pdfIn PDF document text
    • http://jidojig.epizy.com/84336220558.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/riwebebewexozawivakuma.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/36994444077.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/tubedesatumewezajonek.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/cx500_performance_upgrades.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_off0000dd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD64 5240 bytes
SHA-256: b054c9113ee1b9d0fa2a1287946f4f16e1c12aad59068ac95fba512d9609db50
font_01_sfnt_off0000ef27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF27 10688 bytes
SHA-256: 4523026ec58e8583cf74f14f9e154c17a3698c11f4e0e2a8f54cbed2bc166fb7

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