Malicious PDF — malware analysis report

Static analysis result for SHA-256 6525c47e159084ed…

MALICIOUS

PDF

75.3 KB Created: 2021-03-03 02:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4f216d01acba82fabea08386452ae4e9 SHA-1: abb76b80c342084b304da2369fcac7d71baab75a SHA-256: 6525c47e159084ed13aa3a99987f675564c7d8a2c9357b38db9462a2576642fb
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a phishing site. The document body, though heavily obfuscated, suggests an attempt to masquerade as an academic resource to trick the user into visiting the malicious link. ClamAV and ML classifiers confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=intermediate+microeconomics+book PDF link annotation
    • https://tixusevonatafix.weebly.com/uploads/1/3/4/6/134611731/lozewabifap.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/iguiihi/zopirijarawazen.pdfIn PDF document text
    • http://fujopijur.iblogger.org/fulanopoxumikimetunelub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_600db71994f9f.pdfIn PDF document text
    • https://sumajodezidozi.weebly.com/uploads/1/3/3/9/133997227/wowaga.pdfIn PDF document text
    • https://gotedajasokidu.weebly.com/uploads/1/3/1/4/131407980/gobenamexusaj_baxokafoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460241/normal_603cc57098bda.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/ibXZid8/tewimofe.pdfIn PDF document text
    • http://jotijitod.66ghz.com/arundhati_roy_capitalism_a_ghost_story.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/6691386.pdfIn PDF document text
    • https://virenejamavik.weebly.com/uploads/1/3/4/1/134131854/69ea4.pdfIn PDF document text
    • https://diluzisapi.weebly.com/uploads/1/3/0/8/130814250/riboxi.pdfIn PDF document text
    • https://jubewujug.weebly.com/uploads/1/3/4/6/134653216/dbac3bf9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kefitorexere.rf.gd/samsung_mu6070_stand.pdfIn PDF document text
    • http://retudazugo.rf.gd/does_spirit_airlines_charge_a_cancellation_fee.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/50994465735.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/tinugikulotezifi.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/75767196619.pdfIn PDF document text
    • http://pupanifaju.rf.gd/are_the_vampire_diaries_books_like_the_show.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/34656086547.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_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 5196 bytes
SHA-256: bae3605f1e6d0866aef7577a51a0a78987dd5e98962d1f5ea6b5c6713b266c71
font_01_sfnt_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 10516 bytes
SHA-256: 922e321e49fb6468c29ad29c4f3bf7557f015042aa49d1074f5bbfa6ab6fbcc2

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