Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b635e057cb2080…

MALICIOUS

PDF

80.7 KB Created: 2021-08-21 11:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 6d369b06c35fe47c3e2f6026be562a8e SHA-1: cad2c2bd00a8c3d5f0100adc64015e6fd162c610 SHA-256: 72b635e057cb2080f2f64e4089cf3286849d51f16a9b003c24b2650302e0c96a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites, suggesting it functions as a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content, likely for malware distribution or credential harvesting. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1609e683fd3f91---bibekodurugivutu.pdf In PDF document text
    • http://staples1981.com/clients/b/ba/ba027a536d51c1d997ee76cae6dc9017/File/rolutafebida.pdfIn PDF document text
    • https://myhoteltrip.com/userfiles/file/39440867424.pdfIn PDF document text
    • http://goldsunjsc.com/upload/files/4735006535.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947c85dcc24---zexikejovurog.pdfIn PDF document text
    • https://koratspring.com/upload/file/menamupevekik.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/24999836166.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/4fc6pfm95ccpaoner5rgl5igs6/sukatujawiworazuniduk.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/fatusakevofovek.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/kufijozenevubofek.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0349c2d7e---78819363130.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4dd655997---numefigovokaxugekewini.pdfPDF link annotation
    • http://jtg-antracyt.pl/files/file/32801900033.pdfIn PDF document text
    • http://sam-global.info/files/file/mejizufofi.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/36909133911.pdfIn PDF document text
    • http://citra.cl/userfiles/file/71463963641.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/245e712cb2aa6378c4ef08883c1a3a81/manodositepipukukumifu.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/liwepimabaj.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/89089900869.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/jitefobegatuxudulip.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/jagipanuvizixa.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/vepagewunamizukakedunogo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+do+you+change+the+code+on+a+schlage+keyless+entry+lockPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD588 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 16812 bytes
SHA-256: 61f364367281b4896d56a62dbae769e2b8d8b40ab6ad5f92826c132cc7653b24
font_02_sfnt_off000118fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FA 10940 bytes
SHA-256: 99165675e97df2fa6cbf2faa3e29522beab9e304d995ded8069ce5692eb5093c

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