Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86c2d088f51a13e…

MALICIOUS

PDF

78.1 KB Created: 2021-03-02 05:00:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f913b1091281c5af710a77efdd433362 SHA-1: efec19144c0e96b48e8d90dbffd06f94b26d5947 SHA-256: e86c2d088f51a13e5d8307ef9fc40b658ab214da84140874018b06ee514ecafb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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/strik?utm_term=crosley+record+player+cd+will+not+open PDF link annotation
    • http://zitugaxusi.mygamesonline.org/56606180566.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468554/normal_5ff7aacb10851.pdfIn PDF document text
    • https://tozadifoxu.weebly.com/uploads/1/3/4/9/134904498/nomozejafiv-kaxopuve.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/81137696491.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/how_to_explain_the_sun_and_moon_to_a_child.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413007/normal_5fe14d9bf303f.pdfIn PDF document text
    • https://wenibowefopari.weebly.com/uploads/1/3/0/8/130814001/471ed6bb000c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446492/normal_5fdf0775f021f.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/zikeko/63968690391.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/japigudijokiro.pdfIn PDF document text
    • http://nezenomawaza.epizy.com/guia_autometrica_junio_2019.pdfIn PDF document text
    • http://kixejotidiku.rf.gd/multipart_form-_data_json_c.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/55860858773.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/sozobudosugisam.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/mercedes_glc_amg_63_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/30268032550.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/77041317631.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_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 5168 bytes
SHA-256: 79af48a5024e76ccdd0990246de16083cba8f9e7989e3eea725775cc4096e2d0
font_01_sfnt_off0001065c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 10820 bytes
SHA-256: 55bade067cefeb24cb40b218b3d34bde130889594205cde34456e8a83ecd2f86

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