Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f0ceada367db8d…

MALICIOUS

PDF

107.5 KB Created: 2021-07-30 05:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 589dfd39d168cbf3fbd1b3cdc0738c26 SHA-1: cf15ece35349251a4f9a708a880a45c88d4df1b2 SHA-256: 16f0ceada367db8d49130255bbbfd53663b4cd0e7c32990850fea7637717e736
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are identified as compromised WordPress installations. This suggests a link farm designed to distribute malicious content or phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a718c7b3c---xuwotanadibigaguwudutepix.pdf In PDF document text
    • https://lesfeesdelhetre.fr/upload/files/doniguzobak.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/9dc6f547711293bbc02f7d5fc51722e3/94911910003.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/1094228581.pdfIn PDF document text
    • https://ckmandarin.com/uploads/jimuxowimug.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/15c13397469492c91a7bacb1a4add536/kifelajegajedonasopagaki.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/b9738be44635ad336fd21398dc5724ad/jewakonabilaz.pdfIn PDF document text
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/dewukexelutib.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/luronu.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/52636150811.pdfIn PDF document text
    • http://fittbike.hu/files/file/nekegisuvijuwojorerude.pdfIn PDF document text
    • http://vicorsupply.com/uploads/images//files/57473319971.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/3uega33h20qkffisjhqem6sp42/gotuvirivemezuxefisil.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/34851254408.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/e7466dbb52ec1a58927cf61b322eb15f/xezuwejikageveno.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/jezajuxirubudorulizaso.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cce0ebe7717---toreranipakexexazikedegul.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/38989251265.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/883d2532e2cf1dabfca853f8bab9c199/wemewamizezebomijifike.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/ee834b08dbbad1d3f031fb435d77343e/80012620647.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f67d5795e---repole.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873f12e2e57---dinefagisotaweka.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/63376587373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=is+there+a+first+movie+to+after+we+collidedPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001252f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252F 23936 bytes
SHA-256: 393e5066e4655b6b6befc30322f363b68d1d2283f5b69d7c8f2a00df965640ad
font_02_sfnt_off000163d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163D8 16576 bytes
SHA-256: df3eedeae3976c41e4b0d0cf4ca3e03e2c0a174ce5548a6b09fbf00093765c32
font_03_sfnt_off00017b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B08 2248 bytes
SHA-256: 66561d23f2eb1695a39bb9f88b80d9683298b042bd99b179776941a2f3878adb
font_04_sfnt_off000184f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184F1 10740 bytes
SHA-256: d4a693d0b9f3cd798bb859cabe3c0170a6ed3c14edd64677d125946829d5e457

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