Malicious PDF — malware analysis report

Static analysis result for SHA-256 5daaeea14d8ab789…

MALICIOUS

PDF

69.5 KB Created: 2021-01-14 12:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 20fc35c4a3dac1c3d2ba4206d93ff766 SHA-1: 6f81a0ca5e9d1aa971848f34ca49c28a25aafedc SHA-256: 5daaeea14d8ab789a1bf5ef4c36b66721c758001bf2fdc272951e35d430e4f63
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirector infrastructure or are part of a link farm. The document body, though heavily obfuscated, contains text related to a "bubble sheet scanner machine", suggesting a lure. The presence of multiple external PDF links indicates an attempt to direct the user to potentially malicious content hosted elsewhere.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=bubble+sheet+scanner+machine In PDF document text
    • https://site-1174433.mozfiles.com/files/1174433/73545714889.pdfIn PDF document text
    • https://cdn.sqhk.co/bavimimo/jRKjgbp/vh1_behind_the_music_journey_director_s_cut.pdfIn PDF document text
    • https://bizowubojixix.weebly.com/uploads/1/3/4/2/134265373/214ac41dce130.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuronufepu/gh739Ma/88257159425.pdfIn PDF document text
    • https://cdn.sqhk.co/kumipexa/dJt2hct/proxima_centauri_vs_jupiter.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/2jejhGx/jaregosikuk.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/hdLhhjj/animals_mod_minecraft_1._16._1.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/VRAiaaq/69879223474.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/ighehb4/narulevaremuf.pdfIn PDF document text
    • https://site-1171487.mozfiles.com/files/1171487/sokidetadamom.pdfIn PDF document text
    • https://site-1252467.mozfiles.com/files/1252467/daily_life_in_ancient_rome_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/javijaxim/v8tgfgf/23786275914.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/xivokafuda_xurapuzo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/tejerenede.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/doraemon_unreleased_game_apkpure.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63C 5000 bytes
SHA-256: dc4becdfefdd16482407f215079c8354db7c3c6b4f960d0de46c3d0813512662
font_01_sfnt_off0000d700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD700 10664 bytes
SHA-256: ef35a7c70b8b4a739de080a0637fa1eb7138a992d0fdc5d5659b028d1bba4a49
font_02_sfnt_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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