Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff648418c43b87a4…

MALICIOUS

PDF

80.0 KB Created: 2021-03-14 10:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9991ba67c5709dc221fba6f9a9545a2d SHA-1: 8a29f7f8ab7110a77b2208b716b7fa5bde1d3798 SHA-256: ff648418c43b87a4e49619ed5b9bc30bab9ecfd153bcb1ee70fbb7d701074df4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by heuristics as an external URI and an embedded URL. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The presence of the URL and the detection signatures suggest an attempt to trick the user into visiting a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://pelibifir.ru/123?utm_term=afterlight+fullpack+apk+ios PDF link annotation
    • https://cdn.sqhk.co/zezinojox/gchk3AQ/fantasy_premier_league_gameweek_4_captain.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384634/normal_6003802e3375a.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/eXrhi3b/crush_the_castle_1.pdfIn PDF document text
    • https://cdn.sqhk.co/tirazirevemu/eLhjyz1/into_the_badlands_champions_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408713/normal_6001d42ec1f5f.pdfIn PDF document text
    • http://gopexilif.22web.org/avira_pro_crack.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491159/normal_603425637a94e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_60248ae74c1fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5ffdec417dc4a.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/Yie0Fid/zeges.pdfIn PDF document text
    • https://cdn.sqhk.co/todusukiraxi/YebjLoM/wamil.pdfIn PDF document text
    • http://pimufesijarudiz.22web.org/30198533626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381543/normal_5fee06c24c36d.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/jewizopukuni/does_mal_die.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/what_is_a_nuns_wimple.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/mission_mangal_full_movie_mkv123.pdfIn PDF document text
    • http://litufowanukoro.epizy.com/babylon_dictionary_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/17214274695.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/70877790543.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/decode_bitmap_image_android.pdfIn PDF document text
    • http://tikarere.epizy.com/serenissima_informatica_espaa_s._l.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/xotololaluxemi.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/sizoporineboxuzusar.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/zelijirupumawurojixapowov.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_off0000f242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF242 5332 bytes
SHA-256: 86401e7ab70df3a5fab229125bad50db96197fd41d86fad3e5e979c4b3b01822
font_01_sfnt_off00010460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10460 14456 bytes
SHA-256: 011acf8dc87ad01fd7adfded35a694f768381514445c8e0a0ff1304a25ff2da2

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