Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0b336a198d24b6…

MALICIOUS

PDF

101.0 KB Created: 2021-06-26 03:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: ea95babec675944756132f813922df91 SHA-1: 0f4b1077c559725da28e708c3038d1ebc4e7e9fe SHA-256: 1c0b336a198d24b616350da91e7630acb5259d3f5b41cf983d054743b0072773
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The document contains lures related to payment redirection and instructs the user to copy/paste content into a shell, indicating an attempt to trick the user into executing commands. The numerous embedded URLs point to compromised websites and disposable hosting, likely serving as part of a phishing or redirection infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 https://queure.ru/uplcv?utm_term=how+to+save+notes+on+iphone+as+pdf PDF link annotation
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b66323c2b6---51683287873.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/53154754106.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/ebaf2e7056f4581e54654c3e554cfe56/96235972448.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/66355391247.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071bfb8e4059---46035027254.pdfIn PDF document text
    • http://landpas.pl/upload/file/69784155801.pdfIn PDF document text
    • http://mbcasc.net/imgs/file/bonevirobegolowuxuxe.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090dc11b9d3f---wanod.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/rajeloxugibumunisurosurak.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/65051684254.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/80327012777.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/24866787381.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/11493a1c714011a67addf8953e93dd9e/14078508635.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079ef992b02b---44613360071.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/72316601444.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/rvfj17009k4m3dpggaqd1n0kdg/16897458393.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c5b6432f7---roriwaxuvibati.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/880634ada99ac7c82b58d1a7d28bf6af/37411311845.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160714d7e32a8a---6523441969.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/nodazavorewewimedomugunin.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/1056f2a1434b04d5999d32da414707f0/gunujomo.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a32a8c6faf---99749270767.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/76faa5a99cecc2738db47342de693130/73683545790.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_off000128d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000140eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140EB 10592 bytes
SHA-256: dff3ef3c2490f812d69bd75a166f18aeacf38be0b9edc25985bcffcd0c745cda
font_02_sfnt_off0001590f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1590F 17508 bytes
SHA-256: 3291402a41e24996786015d93a5a70d1e99031dffb454c08c93adaf5bb1916b5

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