Malicious PDF — malware analysis report

Static analysis result for SHA-256 e308ae9becda3aab…

MALICIOUS

PDF

64.5 KB Created: 2021-02-22 18:25:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 209b8c072221227ab9cc18a254845c03 SHA-1: 6faed938ab323f3e985bdc52ce34106defa3f83c SHA-256: e308ae9becda3aabf0dd133e7b5376a3b83028ccef29267eab7fa7e0c7fc563f
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of a PDF link farm heuristic suggests the document is designed to redirect users to numerous external URLs, potentially for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure itself can embed malicious JavaScript, and the numerous external links are the primary indicators of compromise.

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://jacksth.ru/123?utm_term=suzuki+quadracer+250+plastics PDF link annotation
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/dasejaj-dugakiger-jisusexovuwam.pdfIn PDF document text
    • https://nalokulomegeze.weebly.com/uploads/1/3/4/7/134758193/d63b3be45513c1.pdfIn PDF document text
    • https://kazofinuso.weebly.com/uploads/1/3/4/3/134369681/remufajadomipi.pdfIn PDF document text
    • http://dobafeser.66ghz.com/51393153446.pdfIn PDF document text
    • https://webunufilijamo.weebly.com/uploads/1/3/4/6/134677486/jewuwaz.pdfIn PDF document text
    • https://panejukirid.weebly.com/uploads/1/3/1/6/131606092/2a15be09e.pdfIn PDF document text
    • http://zefurasun.iblogger.org/nepisodojilisawuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ximowuve.epizy.com/nozofenipozadonixusekib.pdfIn PDF document text
    • http://zutibebasonuf.epizy.com/23157459474.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/gateway_b1_workbook_david_spencer_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/iceland_travel_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/picsart_premium_unlocked_apk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/toady_s_answer_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/10280245122.pdfIn PDF document text
    • http://silapopo.epizy.com/ethiopian_flight_crash_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/toperekumilare.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/cardinal_newman_high_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/asmaul_husna_artinya_maha_melihat.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/national_glamour_day_shopping_guide_kopen.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_off0000bd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD72 5808 bytes
SHA-256: e355f7514b243e78078e6ed5b62689dfc371c1316c210e261e45bfbd64ccd484
font_01_sfnt_off0000d156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD156 10424 bytes
SHA-256: dca54fb4a3726ba15340429213aefa39ccfa0c8a1851535195fcf6478d31830a

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