Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cea3f7d4b31a9b7…

MALICIOUS

PDF

89.3 KB Created: 2021-07-07 20:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2c46f4cfde574d3a3ce1b75641c6226d SHA-1: 6201ff7762d5944e4c96a24bfa833001249649af SHA-256: 5cea3f7d4b31a9b7c6c6c5fa3dbf6941b29ea50135874adf76c2f898a68e5271
196 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to compromised WordPress sites, impersonating PayPal to trick users into clicking a malicious link. ML classifiers and ClamAV detections strongly indicate malicious intent, likely for credential phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit vulnerabilities or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=odds+on+final+four.
  • 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 http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160976b9129a2c---wevovamubiboli.pdf In PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/oe36o3003djdebc24n3jhqj2oh/18002153572.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/b98f88d7c122a305b96496687d280433/jejefarojaki.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/07b066f9227df4483faa2c0498ca2fb5/tomemotizeka.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60bb8704847f5.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/npkfms0nt5de5phtteh4d6i0g2/92928860941.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/31f467b60401763f9bd8e3fc474ada3c/xumurus.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/6667995cc1beac2385ee10a01c26fb75/96656363123.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160948414c2f6b---tarusu.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075add606a17---76075194299.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/10206568049.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/50479478333.pdfIn PDF document text
    • http://drironcat.com/images/file/76937607071.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/5431826183c5afe0e81afede99592ff4/mibitujapimisupozoza.pdfIn PDF document text
    • http://hungthanhauto.com/luutru/files/zejopelekuf.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe96dc8ef3---nexisifololune.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609483a964a1c---49176174434.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d94b97e8f03---wupuxuserexexopi.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/e64418fad65daedcdbb3d7b505ff1ab7/berulafid.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/mogamevolive.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/6306d657e7930c40d457af54be4600ba/47649297819.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609448ddbab37---39561013367.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/fcf9f51106edd3b66de8356a8371b473/99263461835.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=odds+on+final+fourPDF 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_off0000fa0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0D 17604 bytes
SHA-256: dc0b08f498fc46c813b346f8962f37c7bd4de763a87f888612bbf2e038e3aa23
font_01_sfnt_off000127de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF5 10240 bytes
SHA-256: 25f681d5f7c5bd6bac00ebbad7d21a4c1795c2af0a25b76c59c2dd01bf32ba46

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