Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7675866ee111152…

MALICIOUS

PDF

72.7 KB Created: 2021-02-28 21:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1ebf296001abcfa902247ca0af439452 SHA-1: 6edbd023fd996f28a63d6c9ac8661cce2a384caf SHA-256: c7675866ee111152726b1ba3041211b15aa7705f1bebba810a0c695b210749fd
136 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 high-confidence ML classifier and ClamAV detection. The presence of a redirector link disguised as a download lure suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself contains malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://gimoguvi.ru/123?utm_term=can+samsung+a50+battery+be+replaced PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379744/normal_5ff7831d6d423.pdfIn PDF document text
    • http://rerubin.space/wowhead_demonology_warlock_guide2g2q2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465262/normal_60182dbd7d650.pdfIn PDF document text
    • http://storeplus.pro/memmedbagir_bagirzade_xatireler_mp3_yukleoo0h0.pdfIn PDF document text
    • http://trastenmyqort.online/quantitative_aptitude_questions_for_bank_po_examgen4a.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/luborinizu/voice_recorder_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/audio_converter_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/assessment_form_nursing.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/why_is_the_short_run_curve_u_shaped.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/pepiziparetan.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/xepulubibigo.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/adverbs_of_manner_esl_library.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/30_day_notice_template_word.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_off0000dd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD94 5808 bytes
SHA-256: 48b57e3696c65a98c9e9139a72ed39cd6f1061de2f9068306bdceeab9e1239a3
font_01_sfnt_off0000f140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 10816 bytes
SHA-256: aebcac965a7800070299fafb03d2012c1c6f3c6d04803022c13b39543fe50c54