Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae64cadc6015000…

MALICIOUS

PDF

86.1 KB Created: 2021-09-18 16:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ab54601dda7aaa81de357f03bafe8ad5 SHA-1: 984e5e35787cdc77741d4d644f39e38e1ebd22fa SHA-256: aae64cadc60150004736801fa27fd69ba02e4f77748d5e8e6d44bcab185b149f
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file is a PDF that exhibits social engineering tactics, specifically a 'ClickFix' lure, instructing the user to copy and paste commands into a terminal. This is a common method to bypass macro restrictions and execute malicious code. The presence of numerous external URLs, including one pointing to a potential download, suggests the document is designed to lead the user to a secondary malicious resource. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=chrome+os+img+file+download PDF link annotation
    • https://portalbime.com/UploadedFiles/New/file/16869548900.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/miguzaritorixasedif.pdfIn PDF document text
    • https://www.natursany.com/ckfinder/userfiles/files/jusolivo.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/70641324455.pdfIn PDF document text
    • http://tianlanlawyer.com/filespath/files/20210910092250.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/julekikukixedemaxazova.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/puvatemibolena.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/wupubopawepekex.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/91895032390.pdfIn PDF document text
    • http://snft.ro/media/file/22526614089.pdfIn PDF document text
    • http://adice-area.com/pictures/files/tanenaxozetovesivaxesoz.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/wizekawigosesenov.pdfIn PDF document text
    • http://uklearningnetwork.com/userfiles/file/38455768167.pdfIn PDF document text
    • https://oferta.lt/i/File/92423902968.pdfIn PDF document text
    • http://knupress.com/pds/editor/file/vafelomuzavitix.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec57b9d270---zopenovabalodolekezik.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/sowalotujelolixedakerukob.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/nibuvigokowubujivugad.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/4476660068.pdfIn PDF document text
    • http://srcchaika.ru/files/uploads/files/42983667414.pdfIn PDF document text
    • https://semangkabiji.com/contents/files/99690964153.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/xegato.pdfIn PDF document text
    • http://weingut-suppan.at/files/kawogufaf.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/5584891559.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/60845934089.pdfIn PDF document text
    • http://magdrywall.com/project-new/christianbook/upload_images/file/pogukofisuloluvexeju.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://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_off0000ec54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001046b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046B 10820 bytes
SHA-256: bd056df3fd9e78bee7f02964e44f329b729758c242912b6b8162ddb7abd1320a
font_02_sfnt_off00011d07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D07 17676 bytes
SHA-256: 8b45e0d096df6b32bd2c5f65bee78000fa251ed571c4abe67f9e24bb6e6862da

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