Malicious PDF — malware analysis report

Static analysis result for SHA-256 a596a974c007d311…

MALICIOUS

PDF

73.3 KB Created: 2021-03-09 21:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9460cd0decf8ab9b2b495e3c1695bdca SHA-1: d1ac193d3f6eb1db0949dd63028cc81cb75d94a1 SHA-256: a596a974c007d3117683e45b92cc79ee133d201303cd19bb12928d6c4318f7fa
136 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a high-severity rule indicating it's an image lure linking to an SEO redirector for free-download phishing. ClamAV also detected it as Pdf.Phishing.Trojan. The embedded URL, https://dugedepap.ru/award?keyword=bhu+bsc+math+syllabus+pdf, is the primary indicator of this phishing attempt, likely leading to a malicious download or further redirection.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dugedepap.ru/award?keyword=bhu+bsc+math+syllabus+pdf PDF link annotation
    • http://potenciy.xyz/45647669643ayxbs.pdfIn PDF document text
    • http://ketrovk.xyz/xodamlgb69.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450243/normal_5fddcc690e33b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446401/normal_5fddae9f3322a.pdfIn PDF document text
    • http://bidimiw.sportsontheweb.net/91212430448.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_6031ec173b4c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367004/normal_5ff66b7ad67f1.pdfIn PDF document text
    • http://rkconstructionsucks.com/piruxeliwejelymn3e.pdfIn PDF document text
    • http://gadatoreneperil.mygamesonline.org/how_much_is_hp_stream_11_in_nigeria.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427809/normal_5fca206b40995.pdfIn PDF document text
    • http://naturfresh.space/dafuvajadovigomy60a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wipidomi.rf.gd/pete_s_dragon_full_movie_in_tamilyogi.pdfIn PDF document text
    • http://zawuzujuw.epizy.com/gitlab_custom_merge_request_template.pdfIn PDF document text
    • http://begokev.epizy.com/plant_and_animal_adaptation_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/55164434830.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/1847758276.pdfIn PDF document text
    • http://zepibugab.rf.gd/wilobibatomireze.pdfIn PDF document text
    • http://pikezega.epizy.com/star_wars_dark_disciple_review.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_off0000e383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE383 5588 bytes
SHA-256: e447a95404fdc2f5722804e57d74645b77ffbe1faf8fd990baf47105ba715fa4
font_01_sfnt_off0000f668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF668 9936 bytes
SHA-256: 5f686f35c5f90b6371bfd56298b9431d56606f74bfc87b0fb678048597c574f6