Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5459ecefdb8e80…

MALICIOUS

PDF

90.2 KB Created: 2021-08-12 15:28:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 901d09c11341021f32c6f562beb753b3 SHA-1: 358439523d8ab13088bbfced772f1b991737119c SHA-256: 0c5459ecefdb8e80fe2482d89fd74044d26cf040e4a31fbd19efec48de78586f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports a malicious classification. The URLs are likely part of a phishing or malware distribution scheme, masquerading as download links for software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://smidgel.ru/uplcv?utm_term=minecraft+v1+14+free+download+for+pc PDF link annotation
    • https://zenmobile.in/jaipriyart/uploads/files/rufida.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b21b82127f---rabopalifulokolisi.pdfIn PDF document text
    • https://arerp.kr/data/file///nidofuxofesigugofefadane.pdfIn PDF document text
    • http://etrustmi.com/ckfinder/userfiles/files/gawamapetu.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/rh3la3ec1hgi83nj2m91499453/zevigejepidukabos.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/t2umc9ec5m0lr1fjsl0gn9jnd5/fepoza.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/viwibirugoma.pdfIn PDF document text
    • http://zxsolar.com/d/files/38084127152.pdfIn PDF document text
    • https://perfectprojects.ro/userfiles/file/1034876154.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/ffe42dcc27124238f2368a725e37104e/9388198857.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/jufamileniw.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160afa9cc9b7e5---14356482714.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4320cd391---sarakipalewok.pdfPDF link annotation
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c9ebb373bbc10d74f2b590d49dc2c3d1/93558784254.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/14387440324.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/20326724691.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b22889c68---zawevatakumakasomidukubiv.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160845ae496a57---95832923668.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/74a728931658a867ae34d1ba2cb60139/gifelidiv.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/82072910734.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/dokeveduzoriborugedowed.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/ziginezabarusu.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c081b3091---molejo.pdfIn PDF document text
    • https://mytopics.it/uploads/file/fuwivonafakivazupasitosug.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_off0000fbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF0 17844 bytes
SHA-256: 00670de2bf06d1febc9da1046ef8e3864b6290adf2a50872c4385216b1ce3781
font_01_sfnt_off000129be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BE 10720 bytes
SHA-256: c8b3d4c859a9ae6ac025ec013398615f5110c2f052298a859ebbc0ddbd783270
font_02_sfnt_off0001429c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1429C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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