Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee1fba3ec7deaa7…

MALICIOUS

PDF

71.2 KB Created: 2021-09-21 05:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f461624412a027012c2980b84639a631 SHA-1: 5ba50885245d9d29705965ebf777ebba8bebf458 SHA-256: 3ee1fba3ec7deaa7a1be546e2d03d9312ee0ffcf9f34de2741ca4f2cacbb5f4a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan distribution. It contains a link farm with numerous URLs pointing to PDF files, suggesting an attempt to host and distribute malware or phishing content. The presence of a Google feedproxy URL with a 'turbo vpn full apk' term indicates a lure for potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://yztools.com/images/upload/File/nipoxubafuderej.pdf In PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109111100212728.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/zanekukinije.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f4f36f322---31726066842.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/kajipukuvumobapevumu.pdfIn PDF document text
    • http://artetendasud.it/userfiles/files/34106989434.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/fenanajogulovodoxemal.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/nagovogotisifenixagase.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/padivajavuxibu.pdfIn PDF document text
    • https://stichtingech.org/ckfinder/userfiles/files/61457472164.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8958eb871---jikedavilopefujarofezafu.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/girunaxelakim.pdfIn PDF document text
    • https://westhygiene.hu/editor_up/75433940298.pdfIn PDF document text
    • https://undergroundtakeout.com/userfiles/file/6130317568.pdfIn PDF document text
    • https://argumentua.com/i/file/bepuredewatej.pdfIn PDF document text
    • https://kamarkosong.com/contents/files/retufademugivodixuwoxano.pdfIn PDF document text
    • https://maintogelonline2.com/contents/files/556219860.pdfIn PDF document text
    • http://torgoborud.org/images/file/retokekuvijotu.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/savuketep.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///89455054827.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/mumovalidipu.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/tapexuvejekizazazu.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/70885659229.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/kovonisazomube.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=turbo+vpn+full+apkPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB710 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF27 10224 bytes
SHA-256: ca40ae48d535ff07b1ab62d11ca4c6acac3fa2bb11befba48006b0039b9d99ff
font_02_sfnt_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 16328 bytes
SHA-256: 94fe53afc094cf5776d7b4d97fb7a4dbbe0944ebf491746d630c4a556ad8a59f

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