Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14b3c63ab3f968c…

MALICIOUS

PDF

97.9 KB Created: 2021-07-26 18:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3913d3061955ac5d9a95345fc7af955c SHA-1: a5514dcb226919d74799616828073c124fe5e8a5 SHA-256: f14b3c63ab3f968c4c73f0ec7af2533528b5694e6237cedda1f3244a0f391584
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and other disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. The PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c4ae3e8c4a15bfb500963d36566d490b/57998201692.pdf In PDF document text
    • http://chandigarhdatarecovery.com/files/file/37757065423.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/9a833846576f103f2baad1c05c04dce6/tovewasu.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/13976564107.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/50b2e763ae3c5ae18ad9640afdf8b643/88842617757.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/mozurebamideboveguxuz.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf20406391---ruwetavabewuzusuzuwusibu.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/phb7lhp04tijr7rp1ventuch7h/lowekivarumetenofexatik.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/guvatapijokol.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents//files/80606137726.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/mijifusemidufusax.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/68702799704.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/363c314e16f736c7450cf036d2c604f7/duziloxobole.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c22bbf1bea1---genanijonexaviwelomawij.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bec9078e4---49429025099.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c44afe8542e---40465008746.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26d1e34c98---fepufemolu.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/lajakajixabidaruluj.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/5eacc0039b71cd42340808e86be6bc1f/jatabumanaxuxuse.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/630008c039f481385bcede8b0fc3c3fb/xoponoxavugemorep.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/i9a6cnptbu1bpblamh8iu076o5/19474176614.pdfIn PDF document text
    • http://humanlitech.com/files/files/75203802179.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=the+final+quest+rick+joyner+pdfPDF 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_off00011c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C15 16624 bytes
SHA-256: 3f610705ac96f0394284856e8cedb1b293ee0005032b231b5db6c78d28850b1f
font_01_sfnt_off00014747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14747 11264 bytes
SHA-256: 5797bd73ddd3db4492e3c30dfe275b26968f4400c45903be3c741430bee01b98
font_02_sfnt_off0001617a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1617A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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