Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c881d98e1ba008…

MALICIOUS

PDF

88.3 KB Created: 2021-06-25 19:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e851461510102d8254eeb8a8b7be4207 SHA-1: 05e725cbb9f46e6ca7f0db28a684e55970062be9 SHA-256: e9c881d98e1ba008e147a974012d23a8ff0a5bf56507a0c4b0c4b0c607edf7e7
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links. The document body is unreadable binary data, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/59f46e8e3a9cbb63c30e35346334da4d/63650323252.pdf
    • http://broadgatecapital.com/userfiles/file/73075150784.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/k2bhapupr16kh06umh0486alco/gudutulajanezugef.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d55684b6e7f---13563955511.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160772810e8520---mebafamedugogezusepava.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1957dcdb4---88065574971.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//riroj.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/f541f45eb9f3d616338c8405e7c7aa90/9588925518.pdf
    • http://amirafouad.com/uploaded_files/file/89031976683.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/803cb42f28484aa3fcd5536983eacae0/95823620658.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/6000be308b21f9abf0c9bc712161b080/88582406583.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/hpkogo0ofko3etp22if8nvvsbv/pawidoreboxexalix.pdf
    • http://skyline64reunion.com/clients/e/ec/ec378541aa9b73e2b99de5ca5545ec21/File/rokakebonurepemaloxe.pdf
    • https://amatnieks.com/pictures/image/kumijafanatuteni.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be529a49e0c---17645260764.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c18b9293bcf---pusoxikewijaja.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a179b0675c7---82172391155.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/6eb9394231b6c7ade34995f3dd3dad34/zavipenijixofigonubikigi.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb099363ec---bozaforum.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/bcfe13ffabbf234738c8b200ad360e5f/12002234169.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/523a7e37300f3bd43965e1a31b47ec0b/9898995466.pdf
    • http://dchs1961.com/clients/871949/File/94757698907.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160714a7b7f5b1---75131365145.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=healthy+berry+smoothie
    • 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_off0000f646.bin
d3f21513237d91d447624be884f2c3b21760d0429796d5b9627ffb94adc0e007
pdf-font-stream PDF embedded font (sfnt) at offset 0xF646 10512 bytes
font_01_sfnt_off00010e32.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E32 16792 bytes
font_02_sfnt_off00012644.bin
18f279c045aa88313a9c58e96d05b35b85f720d0ef6e6930632acf7f69b9c121
pdf-font-stream PDF embedded font (sfnt) at offset 0x12644 17508 bytes