Malicious PDF — malware analysis report

Static analysis result for SHA-256 931f31cd6a79a1a2…

MALICIOUS

PDF

75.8 KB Created: 2021-03-01 16:36:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7b0617c36982cf5164b4afe4226b66d2 SHA-1: 7d6ee0fdb9746f1dd00a739020225847b1975b4c SHA-256: 931f31cd6a79a1a29412ecbd2acb609e12d30aae9b0dfdd3bff825c44b454fbd
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains a URL that appears to be a lure. Embedded URLs within the PDF also point to external resources, likely for payload delivery or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jottigo.ru/strik?utm_term=how+to+greet+someone+in+latin+america PDF link annotation
    • http://vuwefedope.sportsontheweb.net/nintex_workflow_query_list_example.pdfIn PDF document text
    • http://fafikup.scienceontheweb.net/muvifiralisagisonedaro.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/how_to_thread_bobbin_singer_confidence_quilter.pdfIn PDF document text
    • http://gepavozo.mygamesonline.org/ropizare.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/nujuroxidifowala.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/63333132703.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/kenmore_elite_oven_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/beginner_piano_pop_songs_sheet_music.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/blue_and_white_christmas_tree_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/52801416278.pdfIn PDF document text
    • http://tupaputukexoro.epizy.com/42149654115.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/lepiwaviwejudujedutumak.pdfIn PDF document text
    • http://junorijuzijipu.rf.gd/xaxirepi.pdfIn PDF document text
    • http://tovedevekep.rf.gd/87338365425.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/46785126813.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/xokomoferigovoniligim.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/what_is_usa_today_newspaper.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/acrobat_pro_x.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/apache_commons_jar_maven.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/adnan_sami_all_ringtone.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_off0000ea8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8D 5172 bytes
SHA-256: 3b363dc91837fcc90fe466dd27a7e247ce23df07607612f643f2af7ff1201ac6
font_01_sfnt_off0000fc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC27 11180 bytes
SHA-256: a2ed95aeb7a9dcfd5229393360442e3f7ade3c89de97b7098c11267ce0c75a04

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