Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46bc94082341407…

MALICIOUS

PDF

79.6 KB Created: 2021-02-05 06:27:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3171c0a5db374ca5ba08392ada4a1fac SHA-1: 76ce4728f24e7fd2dc0f835721e38eb447ab7cab SHA-256: d46bc94082341407e90873fd4e2183a80cd29d91870fc56b275e2a638481162e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the presence of external links and the PDF structure suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=nutrition+and+digestion+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495988/normal_5fedf40c02336.pdfIn PDF document text
    • http://websporizle3.com/pukugited54jts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407664/normal_60039c8ad7c6a.pdfIn PDF document text
    • http://magic-spring.com/datefovufelizededumhh5h5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426813/normal_5feebd02233ff.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/417234575666qzf3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465145/normal_5ffde764a305c.pdfIn PDF document text
    • https://tumunonapuve.weebly.com/uploads/1/3/1/3/131379134/lodapoxudi.pdfIn PDF document text
    • http://stonersfranchise.com/amanda_palmer_bed_song_sheet_music3112r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494868/normal_5ff02cf89e74c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_6010c9591d545.pdfIn PDF document text
    • https://webesamogamafi.weebly.com/uploads/1/3/4/0/134012635/5016327.pdfIn PDF document text
    • http://chategratis.online/engineering_drawing_for_dummies0cy1y.pdfIn PDF document text
    • http://allwoman.site/download_game_hungry_dragon_mod_apk_versi_terbaru5k0ro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_5fd273e24aff2.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/sar_tech_3_study_guidefrojq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://silapopo.epizy.com/27195279489.pdfIn PDF document text
    • http://gepobot.epizy.com/64306128189.pdfIn PDF document text
    • http://bugigumu.epizy.com/aulas_de_ingls_bsico.pdfIn PDF document text
    • http://mobisojew.epizy.com/votivazet.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_off0000f4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AE 5180 bytes
SHA-256: d304554ee9eb751d80a05cb05da5a247295d7a46a7e264b1ab140d37adb2e175
font_01_sfnt_off0001065f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065F 13004 bytes
SHA-256: 7880370990e6eaddcf1606e2b67457496a4369c5850bed1eafeacc00408770d7

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