Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a726e9da68be16…

MALICIOUS

PDF

74.5 KB Created: 2021-01-22 04:57:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a829f05731fdfa29024864d5701e60b0 SHA-1: e7f38fd527057684afefd6cb0e43497bd37744ed SHA-256: 45a726e9da68be161f7ebf8c95beed97ddd1f6544c99d3c034c51e3e252773e4
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 large link farm. The primary malicious URL, 'https://trafffi.ru/123?utm_term=dcuo+rage+tank+guide', suggests a lure to a potentially malicious website. While no scripts were directly extracted, the PDF structure and heuristic firings indicate a malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/123?utm_term=dcuo+rage+tank+guide
    • https://static.s123-cdn-static.com/uploads/4377410/normal_5ffa985071b90.pdf
    • https://static.s123-cdn-static.com/uploads/4448536/normal_5ffb3ae41056e.pdf
    • https://cdn-cms.f-static.net/uploads/4412768/normal_5fe9cf0bab678.pdf
    • https://static.s123-cdn-static.com/uploads/4477886/normal_5ff0f34baed87.pdf
    • https://static.s123-cdn-static.com/uploads/4453327/normal_5fdf80a01c64a.pdf
    • https://kojaresojew.weebly.com/uploads/1/3/4/3/134312518/557be522.pdf
    • http://bewugexujiz.iblogger.org/rupinder_gandhi_full_movie_video.pdf
    • https://site-1179185.mozfiles.com/files/1179185/90303209697.pdf
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/motujomapuzif.pdf
    • https://static.s123-cdn-static.com/uploads/4421788/normal_5ffff555ef4a1.pdf
    • https://static.s123-cdn-static.com/uploads/4470223/normal_5fcceb5830c99.pdf
    • https://babapijolirex.weebly.com/uploads/1/3/1/4/131409508/6070832.pdf
    • https://bilokomomaxin.weebly.com/uploads/1/3/5/3/135397692/kuzezo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bezutu/airlift_5000_owners_manual.pdf
    • https://s3.amazonaws.com/wopari/china_visa_application_form_sample.pdf
    • https://s3.amazonaws.com/xuxifuzituwu/jojamufal.pdf
    • http://keputeka.epizy.com/keystroke_logger_for_android_apk.pdf
    • https://s3.amazonaws.com/nowonovege/crash_course_capitalism_and_socialism_worksheet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5e5.bin
5e09c4114f4b42511be804606612aa56b2a8c7c5740e58d6842c3a5d72dbd8cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E5 4960 bytes
font_01_sfnt_off0000f6de.bin
04551b7536881fbb36ec1595227336301f6fe0eabccf476b1230bd63347cfe7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DE 11120 bytes

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