Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f8e616d8a6a8fe…

MALICIOUS

PDF

83.0 KB Created: 2021-09-08 06:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2c4e521d45793f1ac77c0472e2c883e5 SHA-1: 0a7053c0252b6310c2c9e8b7ec632735d8f26a32 SHA-256: 50f8e616d8a6a8fe569b3f349e93d6e9615b291c3fe0f2d64d630565242e5160
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains numerous links to external sites, many hosted on compromised or disposable domains, suggesting an attempt to distribute further malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mimpishio2.net/contents//files/kaxumutimefatew.pdf In PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/2i2pdereoonau5absng3p3uht4/62417383758.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/94454515034.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/74603703056.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/weveg.pdfIn PDF document text
    • http://merwepizza.com/upload/file/29696075424.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/66820732464.pdfIn PDF document text
    • http://all-premium.com/user_file/files/69890535399.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105092033408300.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610f0ed0b0166---76710235696.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/t7eshjb1kubapkkdn3mf2cgft2/89177610762.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d4b68d2b2---lisugilubevazisod.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/79110426153.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/jobuwa.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/4e184c7797d3a119faef67501ea34640/kimadof.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/4513ab2cf3327e234104fc6268c91365/83197755976.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082bad9e43dc---98287755519.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0543a2463---bifoxenivugusubewiwi.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/wotepamewetafubabegavo.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/gobufejij.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/73522715330.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b607547b6f1---jevus.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/95653269.pdfIn PDF document text
    • https://5uempat.com/contents//files/miwisut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=password+protected+pdf+to+excel+converter+online+freePDF 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_off0000d9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FF 19412 bytes
SHA-256: e895eccd748d609450e6e92b85ff9147f24b3a7dd94be7ae740a0842a68b7ba8
font_01_sfnt_off00010c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0A 10868 bytes
SHA-256: 9a1dec032f854472f0916884f7f6b5cb2d3ec756c35bc9ad50f7ecf91e8899d9
font_02_sfnt_off0001255d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1