Malicious PDF — malware analysis report

Static analysis result for SHA-256 02ea5cb1136a0e15…

MALICIOUS

PDF

69.1 KB Created: 2021-02-16 09:07:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6f2564ee4d7f3525d0801f76e2f8d5ad SHA-1: ea1c93b9cc8729cf2fb152012e7c5508a763dd61 SHA-256: 02ea5cb1136a0e1515c77fea6a6572901205385fb8d3ef4a5cd36f87624dfe49
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 pointing to PDF files, suggesting a link farm or SEO poisoning attempt. The presence of a critical ClamAV detection and ML classifier flagging indicates malicious intent. The document body, though heavily obfuscated, contains a URL that appears to be a lure for users searching for local restaurants, likely to disguise malicious activity.

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://jacksth.ru/wix?keyword=hibachi+table+restaurant+near+me PDF link annotation
    • http://xaxikobovivo.22web.org/vipobotexa.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/xijapunojazipejenup.pdfIn PDF document text
    • http://stavki-na-sport.site/temopalonafelage2sqz.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/a0gejhK/vumokadu.pdfIn PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/vokajexoga-wopelurazotef-ronopinujazav.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/ji1gc6q/is_starlit_adventures_online_multiplayer.pdfIn PDF document text
    • https://wamabiror.weebly.com/uploads/1/3/1/1/131163705/9d7712739e.pdfIn PDF document text
    • http://derixen.22web.org/5495400301.pdfIn PDF document text
    • https://voguxobone.weebly.com/uploads/1/3/1/3/131379379/9c995fa3b6e.pdfIn PDF document text
    • https://nixunirebexif.weebly.com/uploads/1/3/0/7/130776125/1e6a275e16a6071.pdfIn PDF document text
    • http://milanomoda-italy.website/priesthood_endorsement_form1lpn4.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/fowikorejodi/34624455247.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/naxolufevotuzuxalonupita.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/9718279824.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/85911606489.pdfIn PDF document text
    • https://s3.amazonaws.com/sejakopa/51527311749.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_off0000d1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EA 5140 bytes
SHA-256: 429f08b01f2351f348ad51fa85257b8902b55cbdddcb58fb546b2f9cc3473d88
font_01_sfnt_off0000e335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE335 10608 bytes
SHA-256: a018e47bc923c9520c48c92cf4a31bba3964e25d2d1a93b1dfd6bac3cfe5e96d

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