Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab353ad579de17ce…

MALICIOUS

PDF

75.9 KB Created: 2021-02-27 23:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 913469097851f6c24d068bd2f8f601f8 SHA-1: 23d4d41be22ff82047034c65c2e07f53d14dab6e SHA-256: ab353ad579de17ce480c98db0f2c775ebbdc88d2fb1668e7d8f46c230114d963
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript T1553.005 Security Software Installation

The sample is identified as malicious by ML classifiers and ClamAV, with a critical detection signature. Heuristics indicate social engineering tactics, specifically instructing the user to bypass security measures and execute commands, consistent with ClickFix attacks. The embedded URL likely serves as a lure or a download source for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://mezovuduw.ru/wb?keyword=logitech%20k330%20wireless%20keyboard%20not%20working%20but%20mouse%20is PDF link annotation
    • http://abanca-electronica.com/cartes_du_ciel_linuxri83m.pdfIn PDF document text
    • http://weareanonymous.org/murray_38_riding_mower_baggera22xi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5fc88db52b05d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494889/normal_600ffde7332f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446494/normal_5ff7aa812abf3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471688/normal_5fc6d94d79056.pdfIn PDF document text
    • http://nasamipow.22web.org/leferofifulume.pdfIn PDF document text
    • http://evilcheats.fun/jimolaritumerlpyyc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470678/normal_601efb248343a.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/gatazeromij/life_is_beautiful_movie_dual_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/lebomodigin.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/mikifogubawu.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/24608191523.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/latest_version_of_whatsapp_plus_4.pdfIn PDF document text
    • http://fevusavumerow.rf.gd/naxewunikowaxonazul.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/3955203056.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/wenapubokukefumadukitamal.pdfIn PDF document text
    • http://bibirosomuxir.epizy.com/sipahi_bhojpuri_movie_hd_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/ledejo.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_off0000eb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB11 5996 bytes
SHA-256: 4fe1dbaf543c2515b5ff42694dc9c34b328719890f4f9f0a04c2ca5747f96452
font_01_sfnt_off0000ff6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6A 10148 bytes
SHA-256: 16e0ddd74a4e1574409b1ae326bceea79c3a153283982c98e5b6f854875b0a01

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