Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e50d62aa109b6b…

MALICIOUS

PDF

88.3 KB Created: 2021-07-13 16:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16ce5ff0c160270920b48f21cabed957 SHA-1: 9ee62900aa15996784df081ff7279bac16c766c6 SHA-256: f2e50d62aa109b6bfc33c521941118e123cfbaa77f61bd0815af1cceec5e19ad
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV. Heuristics indicate it's a link farm and a social engineering lure, specifically a 'ClickFix' attack that prompts the user to execute commands. The document body is heavily obfuscated, but the heuristics strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://alemotta.com/resources/original/file/32493511404.pdf
    • http://ahsaipu.com/v15/Upload/file/202154357276942.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/63803891adc54b2c20a4cb9138c39a38/85792529432.pdf
    • http://elijahlaurabishopblack.com/clients/b/be/bed082b287f5bb70db4763ab929fc18a/File/2560112255.pdf
    • http://www.parkwaytransplant.com/media_upload/upload/files/fesaduborewapo.pdf
    • https://bloomlight.pl/_bloom/file/30778523623.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/uja8e0mimkhclth5q90qhlt4fe/67287895320.pdf
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d34341d77---nopimajikijufu.pdf
    • http://mini-garden.ru/userfiles/file/21775331929.pdf
    • http://childhood-matters.com/clients/49507/File/8952492481.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8ada1113f---38218136705.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f11bd2487---59106085097.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5283b8965---befebopanavikufuda.pdf
    • https://alamansyria.com/userfiles/file/61302422371.pdf
    • https://iamtimeshare.com/userfiles/file/xisuzu.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608832a8bf129---pusimidiput.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/2laj3juapl32rc107h389q8h92/zabesatidudejegimetadaz.pdf
    • http://alimentosldm.com/userfiles/file/tidobovixo.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/914ee1e7fefae769dc72047ebde2aada/24738874576.pdf
    • http://m2mus.pro/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/refivewovupejoparozobenag.pdf
    • https://economiadecomunion.net/ckfinder/userfiles/files/zuwiv.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/9unph35q2tm6bbrmp1qfollfk2/41985310806.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/a461f7a9df2ba890a6643d5926bf9d04/59947350465.pdf
    • http://hakemokulkiyafetleri.com/upload/ckfinder/files/xesuxakogigirukotisu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=shortcut+key+for+alignment
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A0 16792 bytes
font_01_sfnt_off000109b2.bin
601045c99f5ede93b376e207307efbfbd2ca324408b77b5a8928b56e4fa02a98
pdf-font-stream PDF embedded font (sfnt) at offset 0x109B2 18416 bytes
font_02_sfnt_off00013a97.bin
7f6f2dab39a858b213468048f287701363b4737729992585021ebddc09af8400
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A97 10996 bytes