Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1aa4530d51e57a…

MALICIOUS

PDF

81.1 KB Created: 2021-02-21 13:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 53f3db3e0756fb7de30f85f506ed4f9c SHA-1: 20603f7b6d19f489f7978e113e1e8fecfd0a9890 SHA-256: 7c1aa4530d51e57a5352f13bd976a767606bfce05ef40dd1581c07e9e17d2c60
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates tracking or campaign-specific lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/strik?utm_term=i+want+to+be+normal+manga PDF link annotation
    • https://cdn.sqhk.co/pirasemofoge/hQ7Tif3/video_editor_with_music_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gulaxemetila/fa91qjJ/ratin.pdfIn PDF document text
    • https://fubexomufepa.weebly.com/uploads/1/3/4/8/134850999/5150147.pdfIn PDF document text
    • http://ita-bio.fun/que_es_ser_pobre_de_espirituha9mc.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/tonolomin-nidoberafaluma.pdfIn PDF document text
    • https://vesabigixovo.weebly.com/uploads/1/3/1/8/131857304/nepesulenitud-zuwodowivuzopa-xujiwarolega.pdfIn PDF document text
    • https://nefabilaj.weebly.com/uploads/1/3/1/4/131438225/kugoguvos.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/wMI7jjt/bingo_at_home_app_pattern.pdfIn PDF document text
    • https://liduwofixuxobef.weebly.com/uploads/1/3/0/7/130739348/2877426.pdfIn PDF document text
    • http://pagebake.com/mini_international_neuropsychiatric_interview_7.02q2c0.pdfIn PDF document text
    • https://bapuporodotuxo.weebly.com/uploads/1/3/1/3/131381531/a8be7b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_5fdbb1128507b.pdfIn PDF document text
    • https://fodubimofo.weebly.com/uploads/1/3/4/8/134884763/8558245.pdfIn PDF document text
    • https://pufabakorulur.weebly.com/uploads/1/3/4/3/134320636/8177679.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/WJkEH9d/60488936696.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/mefadedosuw/indian_flag_hd_wallpapers_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/xevijipoxoxufinezewinekaw.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/54205605211.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/handwriting_worksheets_for_grade_1.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF82 3428 bytes
SHA-256: 396dcd7753df9c545ad25885b34e09c50e7bbafbe0806c48037554b3403ebc13
font_01_sfnt_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 4996 bytes
SHA-256: ea565a5fc41842b1ffa6c7ac8f3687446c9eaf71d26d14a4d05643e22923a3a8
font_02_sfnt_off0000fcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD9 10632 bytes
SHA-256: 69ddf9a666fe1d0edf0740d324b834197aa9571327214dc9fde46d92b7fc84f8
font_03_sfnt_off0001215a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215A 16100 bytes
SHA-256: 35b3887cf2620817609c04b9c8cd5f2dc5ebc76fc104a3cf8030977a495f3736

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