Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe712680acdbb0a0…

MALICIOUS

PDF

104.5 KB Created: 2021-09-02 18:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6d7e23f749c610cd6ed8d5e1707f193c SHA-1: e9c6107508b708506d15c394527a9aec0be09cf1 SHA-256: fe712680acdbb0a0cc813947d6214a331358184048cae76d3b51b6152f606393
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of numerous external URIs and link farms hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing pages or download further malware. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://crysiq.ru/uplcv?utm_term=human+resource+manager+job+description+pdf PDF link annotation
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611dcf1e37f11---nogonimojinopixizujolar.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/lvtu105oe114e2b2vebqv5okjb/defebul.pdfIn PDF document text
    • http://hiddenroots.org/clients/19739/File/pitesejedesa.pdfIn PDF document text
    • http://cloverdiamond.com/file/55239863209.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/5d8bf245f1913780660b4db06377dcc9/52034400306.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606f02360d0cb---rolewapu.pdfIn PDF document text
    • https://congchung7.com/upload/file/47588979815.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f9b5ecc63---zetepu.pdfIn PDF document text
    • https://egca.fr/userfiles/file/xipuwarutol.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/d955f548879c78a52e4397578c2ef8aa/bedegulavosituk.pdfIn PDF document text
    • http://venkateshservices.com/uploads/34903960736.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/pesujagenokexiwewedugazin.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d712ed50d---92367343122.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/7483433377.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/bmj0rb8dpkeu0si03hu8u34ri1/lopogoponivuliloxozujasof.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/20152212153.pdfIn PDF document text
    • https://biocoils.com/img/file/nafomakumaxorekejabijizar.pdfIn PDF document text
    • https://yuss.it/file/18905731412.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/89117528010.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/lesezazovobomolo.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/cf5c0108a8ec535ef7a99deb7090b7d3/fewokefoxat.pdfIn PDF document text
    • https://raptiherbal.com/ckfinder/userfiles/files/zamugozuf.pdfIn PDF document text
    • http://redactron.com/userfiles/file/kotojovobenarob.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/6257715248.pdfIn PDF document text
    • 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_off000131bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BC 18988 bytes
SHA-256: 484b8ab267cbcbea28167775f1c300c2a271b55f07ee8a122ce5fde0c69dc408
font_01_sfnt_off00016229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16229 11280 bytes
SHA-256: 8a09100113c73dda437c32b61c24116ddbe35dd4fe4532ec5334881f3add9874
font_02_sfnt_off00017c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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