Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f36b2bd01189ee…

MALICIOUS

PDF

73.0 KB Created: 2021-09-19 01:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 43eeab2d29ded50e16d65619d80f5b86 SHA-1: f823a30366dd4e06d7d581887ada510b21bfb02f SHA-256: 45f36b2bd01189eec86b31529a4bc18b952c3e40312697bcc6c63bfd8d541c4e
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically for brand-impersonation credential phishing. The document attempts to lure users by impersonating Netflix and directs them to a suspicious URL, likely to steal credentials. The presence of external URIs and link farms further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://oniceh.ru/uplcv?utm_term=wwe+supercard+hack+apk+season+6.
  • 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://oniceh.ru/uplcv?utm_term=wwe+supercard+hack+apk+season+6 PDF link annotation
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/jurusogimufebedoxo.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/79311183513.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/ginupili.pdfIn PDF document text
    • http://splogservice.ru/content/files/78096551072.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/13962568606.pdfIn PDF document text
    • http://reyazahmad.bscsaoner.in/ckfinder/userfiles/files/85165704223.pdfIn PDF document text
    • https://quangtriasianwindow.com/uploads/image/files/18031186608.pdfIn PDF document text
    • http://saimiri.name/upload/file/nolapigaxireluxi.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/somususeduwofipirasuvibob.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/majenonitanofir.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/0e9370f97890f9eebf20ec23cf465d9e/80794375530.pdfIn PDF document text
    • https://huanghecables.com/d/files/towafar.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/91476534426.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de897e6c6e---kenafokaruwapukopumi.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/11188554038.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/23840338726.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/xokigusomemexijipuzudiza.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/8102dd3606034a43b8009b05691206d4/94534109043.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/45654462951.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/45832261171.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/sofuvilelowugaguzis.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/woxifi.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_off0000b960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB960 10812 bytes
SHA-256: 288f0bded57667d9ef052a027c02364c8664f90be1dd867094160670a4904895
font_01_sfnt_off0000d254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD254 16992 bytes
SHA-256: 8636eef169e8dd35e5cdcabc83b3f81648f1be64f42d8fc5ecde735c6e644841
font_02_sfnt_off0000fe37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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