Malicious PDF — malware analysis report

Static analysis result for SHA-256 227e29c0a531d5bc…

MALICIOUS

PDF

88.4 KB Created: 2021-02-22 23:44:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ca793ea84b84d6705edf37a0a5c62c17 SHA-1: 789d6c39d89c178de498bbed65dbac3e6bbf996b SHA-256: 227e29c0a531d5bc746af1d8ffa4becfcad85b91085523ee0422a1dc7dd76279
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary links, 'https://maypoin.ru/wix?keyword=angelica+zambrano+testimony+part+2', suggests a phishing or malicious content lure. The ClamAV detection and ML classifier further confirm its malicious nature, likely related to phishing campaigns.

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://maypoin.ru/wix?keyword=angelica+zambrano+testimony+part+2 PDF link annotation
    • https://nasavizar.weebly.com/uploads/1/3/5/3/135322571/d4d04f744b66a09.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/ibmghhf/suvawelepagofagumuzebor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468831/normal_5ffc10fd33a45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393189/normal_602b5b14bf08b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391649/normal_5fd6e4c29ee5d.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/BMFjeaL/nixetagigik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_601c69dbc1ca3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_5fdda18c1fd74.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/bajuse/directv_guide_shows_title_not_available.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/corbettmaths_answers_5_a_day_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/film_battleground_sub_indo.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/clumsy_ninja_obb_file.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/best_investment_for_beginners_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/prince_george_county_md_police_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/jumut.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_off00011da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA6 5668 bytes
SHA-256: 5ed7b3357a234823deeac244e07b459278cbe7f05e1e4ef51362c8b8ac662742
font_01_sfnt_off000130ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130EC 10376 bytes
SHA-256: fbcaf3274d7f1d4a0c678c7344d0d55476ad91981e0f6937df67a8d604217f40

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