Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e241fe609e22873…

MALICIOUS

PDF

384.3 KB Created: 2021-07-19 02:23:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d99da343d219632bcb084bb9b4fb4e53 SHA-1: eafdfdbe4fc4d08d368be4ce4546106269ae6b62 SHA-256: 6e241fe609e228731fbebeb97d8d0c36162709ffb210625878f2432aa9438e4a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, with at least one pointing to a compromised WordPress upload storage, suggesting a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9845

Heuristics 5

  • 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.
  • 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://mariellatriolo.it/public/file/wiwerujap.pdf In PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/b8893639a5bcb28788e13048c4c68d24/14474954745.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/vawipugulovodimazikiziso.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed67ce4cd18---72799187317.pdfIn PDF document text
    • http://thegioioto.store/upload/files/faribesetolibok.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d232c7253b---rorizimexo.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b25890dec93---97105383594.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/csr7utbkt3q8o7numim9gl4mu2/xabadoj.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/16092786b39cb7---rebubudigufapinanusev.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083417946f93---kavisoganunexasulinanabaz.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05dec775e4---34973580288.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a80259d8d2a---befirow.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/25283557972.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/gazijiwimipigesifamulowe.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8d5e93889---12342093395.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/medumesoximudu.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/dakulemupesebibewuwafusa.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4f0a79744---pugezuwagokabenofakosalo.pdfIn PDF document text
    • http://lnimeina.it/userfiles/files/sazinafixipurikox.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/lukasefowixusog.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/wikorobokigeni.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607977f9676ec---sifomifopovemebaz.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/1a5d2f75fb2ee0ec0b0b07336d014a7d/23162938901.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/cdef0om6mo450815rko1fpnl36/54483341192.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=nitric+oxide+therapy+in+icuPDF 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_off000583cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x583CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00059bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59BDD 24280 bytes
SHA-256: 44789abd960b8e4dd5ccdf733ba7a05093553bf34e25fda4f86e3044f63fedb0
font_02_sfnt_off0005d9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9E4 10688 bytes
SHA-256: 7997ca208c9af769cf685543beaa1e4e735af712378cfcf66b40d5a5d3598608

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