Malicious PDF — malware analysis report

Static analysis result for SHA-256 cecb2bda8a99486b…

MALICIOUS

PDF

77.9 KB Created: 2021-02-24 00:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 26452c34e164c6f5fb75cdfd75987009 SHA-1: 8518d46a1c1b2c0cf8636dbf74e41ee672a6d3a8 SHA-256: cecb2bda8a99486bc215b083132e43895f3fe27ddb6de732238c0b844c8c5100
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with numerous external URIs pointing to potentially malicious domains. The document body, though heavily obfuscated, contains references to a Casio watch price, likely a lure to direct users to these external sites.

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 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://leonvi.ru/123?utm_term=price+of+edifice+casio+watch+wr100m PDF link annotation
    • http://shtangye.xyz/21709533050a4jr0.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/839093044645zir5.pdfIn PDF document text
    • http://kilobowomix.22web.org/mojov.pdfIn PDF document text
    • http://alisabor.design/volkswagen_jetta_2010_manual7zxtq.pdfIn PDF document text
    • http://shoop-fn.ru/57352375704sjldy.pdfIn PDF document text
    • http://anstel.pro/food_addicts_anonymous_food_planmo3j7.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/ij2Xyja/best_emoji_keyboard_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kizafizutuw/ridN0ij/dial_voucher_game_telkomsel.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/jgjdjdO/xakalafinedudopipudepo.pdfIn PDF document text
    • http://ritual-venki.online/51108123007lu8d.pdfIn PDF document text
    • http://pitushok.fun/3956771372zywnj.pdfIn PDF document text
    • http://opros.xyz/fukimuravugepitujaguwtyc3m.pdfIn PDF document text
    • http://vimatineluxux.22web.org/persian_song_video.pdfIn PDF document text
    • http://it50disconto.pro/causation_in_history_writing8i09x.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
    • http://kidejuwukaj.epizy.com/94699122258.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/free_online_business_flyer_templates.pdfIn PDF document text
    • http://xuwixevuje.rf.gd/nivamogabikile.pdfIn PDF document text
    • http://tuzagexesowojoj.epizy.com/lolebivawuxele.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/project_management_summary_report.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_off0000e542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE542 5200 bytes
SHA-256: 773b6f9946bd0a11b53f426d144648ea66c2e3ff271035169c338dcb52dc444c
font_01_sfnt_off0000f6fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FB 11020 bytes
SHA-256: 75b60646bba289f7f5603a0b1cb54c929e8844264ed7eb70c7bb73e1888ad3e2
font_02_sfnt_off00011c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.