Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c02c7dcc64119c…

MALICIOUS

PDF

69.6 KB Created: 2021-03-01 22:56:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8520cc445eceed05dc1ed7f64c3f14a9 SHA-1: 0621bcd291e2d5113aa39d044685738169fd1f79 SHA-256: a3c02c7dcc64119ca2e863f3494fa48401811edcde2cd8675f124a6d3697516e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting a link farm or phishing attempt. One of the extracted URLs, https://kuzutuzo.ru/strik?utm_term=directv+wireless+genie+mini+wall+mount, is likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=directv+wireless+genie+mini+wall+mount PDF link annotation
    • https://zemezomar.weebly.com/uploads/1/3/4/7/134711889/zikirorapeb.pdfIn PDF document text
    • https://nalodewemutut.weebly.com/uploads/1/3/1/1/131164475/fudisalolibokewiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487626/normal_600fcafc47285.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/fibureverebuguf_xupesajitivase.pdfIn PDF document text
    • https://gomafaned.weebly.com/uploads/1/3/5/2/135296522/f77a47a.pdfIn PDF document text
    • https://wiruxunuv.weebly.com/uploads/1/3/5/3/135324042/af535338e.pdfIn PDF document text
    • https://gasuzenop.weebly.com/uploads/1/3/4/2/134266144/butaxorukit.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/salade/bike_game_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/71656556986.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/fb_lite_free_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/g920f_cf_auto_root_android_7.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/love_yourself_album_answer_songs.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_off0000cf96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF96 5268 bytes
SHA-256: 8e2bb350920c04ef95d2ece8e2e83ae75a3106d47c9cb63c61e7dbdb0c1d1d52
font_01_sfnt_off0000e187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE187 11684 bytes
SHA-256: 2dfa853e0fe7c6d83bd0ec61c5c2e243798b18015087e915186c25545811fb42

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