Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5464e167560265…

MALICIOUS

PDF

125.6 KB Created: 2021-09-04 03:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 57acab57bc6d7d86c94de1f52498f826 SHA-1: 1d58ff1b2299c5e0419f74f79f91cbd16609dd21 SHA-256: db5464e167560265ee5001b9399697680655ee88611559c4dbb79d272e958c48
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable domains, likely to lure users into downloading further malicious content or submitting sensitive information. No scripts were extracted, but the presence of multiple compromised CMS upload links and disposable hosting suggests a coordinated effort to distribute malicious files.

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://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/b3aedb89dbd625c10532b5afb10a9f1c/gelogaxo.pdf In PDF document text
    • https://showdetango.com/bafa/userfiles/file/56842309346.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e358897a37---wipadi.pdfIn PDF document text
    • http://sam-global.info/files/file/66010842856.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/2ab96650d3b40936f2919016ea3d1726/41527199317.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/40120391446.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160933a2f9d1ce---negumozugi.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/161152a142b3e0---taparerozedoguforujizoxiz.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/kamubotulabazifajoso.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e54fe106d0---14348098080.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/6nsng1tec3ekq0hlps0a1vkt8a/wobotixojopozijifavubus.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0c8c85dbcb---42548990187.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/wenamonojokan.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ea9233b129---74602074843.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/98903398299.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/557eebf6d3e424610800bb7a06d285ea/92437444743.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/7907abb59eb477e3e145e9f78f19827f/digumuwetab.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/93157139467.pdfIn PDF document text
    • http://premium-h.info/files/files/8404655654.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871d2c0cf41---26890579093.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ju3v7vg54bg6q63vtou0thpm3/bevofoxenikafopunolod.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdeaf999a47---99451904222.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/xawaxedosadinelal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=give+me+wings+rutter+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_off000181c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181C6 20528 bytes
SHA-256: efd2dd9aa58a5c9c22ea8de345efb378628fa4e14d84e5bf3261b25ce705c4dd
font_01_sfnt_off0001b7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001cfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFC3 10804 bytes
SHA-256: 24bafc034fc13c1d320e7b8858ae9e0f909460ba211d39536eed621155407f70

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