Malicious PDF — malware analysis report

Static analysis result for SHA-256 b72d331f64cf295f…

MALICIOUS

PDF

72.6 KB Created: 2021-03-05 18:17:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00b0e1667a451edb9b6572fe4b1fa527 SHA-1: c6452381312bf005b5c029b6a03047cde3a23ac6 SHA-256: b72d331f64cf295f8465ebad6d9c2abc48191d5f1c7995637375feadeac3e49f
156 Risk Score

Malware Insights

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

The PDF contains a link farm and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to common technical issues, likely to trick users into visiting malicious URLs. The presence of numerous external links, including one to 'jottigo.ru', indicates an attempt to redirect users to potentially harmful content.

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
  • 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://jottigo.ru/wb?keyword=why%20does%20my%20mouse%20keep%20connecting%20and%20disconnecting PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413982/normal_5feeeef223536.pdfIn PDF document text
    • https://cdn.sqhk.co/sevijeruba/iehavji/medudoluzagexuxobufazeje.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/7477131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456984/normal_60178a59af056.pdfIn PDF document text
    • https://finedogu.weebly.com/uploads/1/3/4/7/134749629/vusenozoxesedewosu.pdfIn PDF document text
    • http://zootime.store/210560967965jr89.pdfIn PDF document text
    • http://montana-media.com/imr_reloading_manual75i3q.pdfIn PDF document text
    • http://hookup154.space/pigedivobdwcs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387061/normal_60239c30b2079.pdfIn PDF document text
    • https://mekebibarefuj.weebly.com/uploads/1/3/5/3/135335096/920445.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366369/normal_5fcbf5402ef8b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419206/normal_5fcfeba5d5259.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/UjeI8bn/liverpool_football_club_latest_transfer_news_bbc_sport.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/gzSJ5pj/koduvu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426687/normal_6000e7cf2fd55.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/xidazeze/jaani_dushman_movie_song_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/60349041540.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/6452955228.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/format_date_france_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/aimbot_gta_san_andreas_multiplayer.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_off0000de23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE23 5540 bytes
SHA-256: 6e6e1809db51f1f4472da53a82c5df790005512e60596ff604bdb008a8add2a3
font_01_sfnt_off0000f0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EF 10632 bytes
SHA-256: 2be2e1d732a53162ba930cd1a81a3781bc3ecc038c7dfe134588b2c63f80fdb4

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