Malicious PDF — malware analysis report

Static analysis result for SHA-256 47db0babaa3f1aeb…

MALICIOUS

PDF

77.6 KB Created: 2021-04-03 06:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec995a68255d12591962b1c4dc86cc57 SHA-1: b76ac66add3282f63cb84c5aef239791fddcb8df SHA-256: 47db0babaa3f1aeb91bbaaf99144d434394fea966848dd6e313ee3fe6b46d95b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://mezovuduw.ru/wix?keyword=eden+prairie+baseball+tournament
    • http://nebemor.mywebcommunity.org/balboa_park_map.pdf
    • https://kenibojowosude.weebly.com/uploads/1/3/5/3/135324683/98db72b43c8c6d4.pdf
    • http://jibakerutev.mypressonline.com/list_of_russian_verbs.pdf
    • https://cdn-cms.f-static.net/uploads/4379610/normal_600ff7154f181.pdf
    • http://rewokujow.scienceontheweb.net/98341246940.pdf
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/tagedesuxax.pdf
    • https://dapijapivabug.weebly.com/uploads/1/3/4/3/134338952/bijowevimomajow.pdf
    • https://cdn-cms.f-static.net/uploads/4490132/normal_6041ddd148d18.pdf
    • https://cdn-cms.f-static.net/uploads/4409411/normal_600bb55cad9a8.pdf
    • https://static.s123-cdn-static.com/uploads/4387919/normal_5ff50ae1cd860.pdf
    • https://cdn-cms.f-static.net/uploads/4479679/normal_60245ded7ccdc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dijuvunote.onlinewebshop.net/zezebewezosadat.pdf
    • https://s3.amazonaws.com/bezutu/ccna_security_exam_2_answers.pdf
    • https://s3.amazonaws.com/dogazisuze/how_to_study_dentistry_in_philippines.pdf
    • https://s3.amazonaws.com/jifesu/15589911953.pdf
    • https://s3.amazonaws.com/defujo/fakexanipinona.pdf
    • https://s3.amazonaws.com/rujabepifar/lagu_anime_amnesia_opening.pdf
    • https://s3.amazonaws.com/gidibesuxi/nfl_draft_team_grades_bleacher_report.pdf
    • https://s3.amazonaws.com/timituvupame/bumozewisodidukubo.pdf
    • https://s3.amazonaws.com/rakabexozu/sig_sauer_sp2022_bb_pistol_metal_slide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f130.bin
a7c75ca031148bc12c4e163f0fa1f14c8d75cd2ff3d1ec9390cc36004f687f6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF130 5204 bytes
font_01_sfnt_off000102c0.bin
3f4a5378f58a6b8db6d518540747442fef78b435b548c697adf627b634c70384		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102C0 11320 bytes

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