Malicious PDF — malware analysis report

Static analysis result for SHA-256 9edca0c5ae799afd…

MALICIOUS

PDF

78.4 KB Created: 2021-08-06 23:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9f0450d8871b99191880aeae9c9e4ea2 SHA-1: faeede99d4fbb75eb9b768fa216758af86aea689 SHA-256: 9edca0c5ae799afd3768f486d5e464ccc7321cae091c102ab25a902767128b5b
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to external sites, some of which are hosted on compromised CMS platforms. This suggests a phishing or redirection scheme designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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://jpbullies.com/clients/2/2c/2c827f09d77a589c2c5c7da8c033a3f4/File/81742368033.pdf
    • http://nano-vip.com/ckfinder/userfiles/files/mibizugipinov.pdf
    • https://komodovo.ru/upload_picture/laxadurojufikezopaze.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/8ffdf41bcfdb20523b18b234fde9fb0c/wajowevapurikemewap.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/a01843d46c33f4d1d3756f907f434070/xibuzilejutoxi.pdf
    • http://agendatourvietnam.com/hinhanh/file/4762175895.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/73kno8t996lh0n77hikvoag68u/mekigexivowu.pdf
    • http://medi-sen.com/files/files/77360826019.pdf
    • http://arch-teh.com/pic/userfile/dovudorunilobobulabi.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778faa5a086---xakaturoko.pdf
    • http://juicewarenhuis.nl/app/webroot/files/userfiles/files/kebogizigofuvo.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/161027c84c36e3---gosatomipadagogivu.pdf
    • https://acronimocostanzo.com/userfiles/file/90982930940.pdf
    • http://rzn-house.ru/upload/file/gedilulutaxegize.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/f38ehsibma95a6ph3atbrc5ks4/70249974347.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/c4e58c3a966d9121f5da460e4a0e9808/36506884791.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/ab08fd0dad438c1dfc66332d5dd85bda/8238386946.pdf
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/wawokalawajipotupagaxepim.pdf
    • https://monamifrance.com/FileData/ckfinder/files/20210705_465202D3415FFB4A.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/6d2644d5186e0b3df3fda7c81716e00e/57426435464.pdf
    • https://studiorampinelli.com/file/69594753000.pdf
    • https://thaiwoodengames.com/files/upload/files/sozefagi.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/f26db091b2f5ea0e3f9f0dfa680e78a8/36998100413.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+do+you+change+the+battery+in+a+liftmaster+garage+door+opener+keypad
    • 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_off0000cdc1.bin
65901002df22785c8e8152d47e2d9ca616bc2d223f36f31db86fc49616614e46
pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC1 11592 bytes
font_01_sfnt_off0000e8b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B6 16792 bytes
font_02_sfnt_off000100c8.bin
3c5a756046d4e26903e0fd7d93a7e7069718e2a30a3daf69e127417fccc9677a
pdf-font-stream PDF embedded font (sfnt) at offset 0x100C8 16300 bytes