Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ea2396fdbb2453…

MALICIOUS

PDF

77.3 KB Created: 2021-09-19 21:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0420c56045f9af198ca8f6ae2559df12 SHA-1: 5100751d7c270da82756b7b6baf2b1fccb7bc147 SHA-256: c0ea2396fdbb2453f277c23f7ac3f0aea01bb73f9b865b97c6a8780bef26dcb5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The embedded URLs, while some are benign, are part of a larger pattern of redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0faa8472f---ruwemigudiz.pdf In PDF document text
    • http://www.jasolasia.com/image/upload/File/69614915621.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1614029e6e5494---11093759904.pdfIn PDF document text
    • http://fkhd.cz/data/img/88374631452.pdfIn PDF document text
    • http://cuacuonbinhduong.com/upload/files/vakupupudazijasasin.pdfIn PDF document text
    • http://iphysiology.ru/upload/15538045004.pdfIn PDF document text
    • http://friulanamarmi.it/images/file/jabaxipudosazafidirafor.pdfIn PDF document text
    • http://tivati.com/uploads/userfiles/file/73345409007.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-7/20210907225706871775.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/85286786445.pdfIn PDF document text
    • http://yuli-china.ru/d/files/vibozavosik.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/2766rl0dbjmbmnl9umvs3gavu6/36060941402.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/17967648683.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/52180586325.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/sifabofud.pdfIn PDF document text
    • http://vntattoosupply.net/uploads/image/files/nirutuxazogutafukora.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/14799489472.pdfIn PDF document text
    • http://wellogo.in/userfiles/file///potafimalipi.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/9750437167.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/1285591892.pdfIn PDF document text
    • http://jlicentral.com/images/authors/file/79827760363.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/12940308385.pdfIn PDF document text
    • https://gemicilojistik.com/userfiles/upload/file/tasutu.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/rotasakiga.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/kitivomofomapawogul.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/47539978152.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/36675659286.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=naranathu+branthan+kavitha+mp3+downloadPDF 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_off0000c8a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A5 10992 bytes
SHA-256: 6673b19ec712c9487db17c7502a64ced5dac2f40707e03e16ac7956bf7d73dcf
font_01_sfnt_off0000e1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B9 17416 bytes
SHA-256: 16e4bb121fe5377421d1369bf9f8a81ce6c14907e8879d1917b8870179bf5474
font_02_sfnt_off00010eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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