Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c044a5eb0e90204…

MALICIOUS

PDF

82.0 KB Created: 2021-02-17 09:14:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 59cf9ac91aaba22007550c92b68621f1 SHA-1: 80b8c6057c186712e67cc40dd7088a91c5cd1ce6 SHA-256: 2c044a5eb0e90204df8d4750b2949d90cb5584c371ac2b2d3df48f8cbcef5926
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://jacksth.ru/wix?keyword=miko+nakadai+fanfiction PDF link annotation
    • http://fesadivu.iblogger.org/miya_bhai_song_hyderabadi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_60100001eb8ba.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/sentencing_guidelines_racially_aggravated_common_assaultoa0ll.pdfIn PDF document text
    • https://fibukumaguwin.weebly.com/uploads/1/3/4/7/134770434/nifizinopovukojitik.pdfIn PDF document text
    • https://sakotitalivuvu.weebly.com/uploads/1/3/4/8/134887700/lakewepigipulejuxox.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/672887.pdfIn PDF document text
    • https://lajisoxe.weebly.com/uploads/1/3/4/4/134435468/9fbee69407a65.pdfIn PDF document text
    • http://kolagiriwu.22web.org/assistive_touch_apk_2018.pdfIn PDF document text
    • http://adanakebap.org/waxosesudajs99ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473049/normal_6001882ab8da3.pdfIn PDF document text
    • http://it50discount.pro/vukadadosizobunetdqzn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495551/normal_600055d8dbea8.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/mawesenasijoser/nezixixavudov.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/rojoveporumugesotujisuge.pdfIn PDF document text
    • http://lorenivi.rf.gd/logo_quiz_answers_level_25_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/cementoblastoma_case_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/75600209246.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/36928412872.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/cra_report_nil_payroll.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/wisaxarokuvupusez.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/66349221137.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000f665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF665 6440 bytes
SHA-256: a606a6dede3b99472d2ac97761204782646b5f75106b48d1abccbe9a99ca9a4c
font_01_sfnt_off00010659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10659 4776 bytes
SHA-256: 05a946637bd68aef5ae95c3170a1e7de7b68aeaeec56717b6b7e0fe2af1b9337
font_02_sfnt_off000116c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C7 10288 bytes
SHA-256: 7063b2cde1c0ace894438480a0f5051b2b895e74bbc427fe347699bc2886f2c6

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