Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b2ac4ed23e95ff8…

MALICIOUS

PDF

155.2 KB Created: 2021-09-07 00:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7a306fbbe179252b2a54462c794e1cea SHA-1: 4de000ad0568263c3a4e8034677be3366216ac35 SHA-256: 1b2ac4ed23e95ff8168ea78ccd37f2a0d7fac655a6e7e9e7cd9c4b0a4055a7e8
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV heuristic strongly indicate this PDF is malicious, specifically flagged as a phishing trojan. The document contains a link farm pointing to multiple domains, several of which are hosted on compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://ever-progress.com/upload/files/84606673666.pdf In PDF document text
    • http://vikohasanfiber.com/upload/files/24600697584.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/88945306630.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f01be14eb---15632020678.pdfIn PDF document text
    • http://life-worldwide.org/assets/uploads/files/25721179372.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/95573044025.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/05164f2fc53ee3fc28765b4425dfb290/lelene.pdfIn PDF document text
    • https://ecole-anglais.com/upload/files/93058262771.pdfIn PDF document text
    • https://www.luthier-auxerre.fr/ckfinder/userfiles/files/3905313602.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/33i4vn1sknnei9b7m6h3n03o7r/gokoguvakafivilubowi.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/17177446865.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/38558435014.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/vodavixejugekodo.pdfIn PDF document text
    • https://www.gico.ge/ckfinder/userfiles/files/34595598849.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/4becaca8835e0bda63e581b3e64cba77/fukododijilibibamabufis.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/476848c3fa17c358e5639f72b93fde17/10817799160.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0goqagrhmog497lagpegoa2hc/monelikusuvupenevamug.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/71102874418.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/rbkasm5bql88lmcaebb13k720m/dovep.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/37487743300.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/bimanodubilo.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/0e38fca6dceb3f029321c36809a6bc52/28182166512.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/87171302766.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/12757088305.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/67952636248.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=manual+de+mantenimiento+de+motorreductores+sewPDF 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_off0001f65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F65B 10708 bytes
SHA-256: 641b27b2540aaaabc493452513b5ecfe5e303b361d510b02e3103028db607c2e
font_01_sfnt_off00020eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20EEF 21156 bytes
SHA-256: 6df60c339b996ef5639a2da940a5041604dee25e7b57812b494b4d815cd60d22
font_02_sfnt_off000244a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x244A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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