Malicious PDF — malware analysis report

Static analysis result for SHA-256 282dc6f6d0adbcf3…

MALICIOUS

PDF

103.5 KB Created: 2021-08-07 20:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0c7aa962e0cf6152a887917ef4551337 SHA-1: ceb0ab3449fbc83f9e2a7a4769995741ce4508c6 SHA-256: 282dc6f6d0adbcf3174246ef6538a9f06b37a14f37ad79b7dc0057814da45ee9
204 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of an MFA lure heuristic indicates a potential attempt to harvest session tokens or abuse multi-factor authentication, likely in conjunction with the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=how+to+reset+bulb+camera PDF link annotation
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/75001322953.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16080ade564595---vetakopasofewugaxosajiv.pdfIn PDF document text
    • http://apple888.vn/luutru/files/bodabilagal.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf7f81c3c4---solukuviduvasezu.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/10246013774.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/96404830837.pdfIn PDF document text
    • http://wowbond.com/upload/Fckeditor/file/jilidibanobom.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/cc85d3aeb2dce723f1de2791f7688bdc/48358056232.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/34509003728.pdfIn PDF document text
    • http://idroter.org/userfiles/files/59185112406.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4bcfa03d9---wupurifakezasuga.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/359f0754b07fa67cf53c6c01e6facdbd/sesur.pdfIn PDF document text
    • http://superbarter.sk/media/file/87204921657.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/32599606180.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/2a1e1d97d2f7914a136c568911575952/12992327441.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/28cb832b1f031af844e7825816b1ef4c/63192807546.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070ebb0afcf1---14043573335.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/54512336916.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/20536374405.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107ddf5831ac---lejufowiraruz.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54d80296c5---tabovutevaga.pdfIn PDF document text
    • http://mrbossamktown.com/uploads/files/tukope.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10246 10512 bytes
SHA-256: e2264e8f8289231cf0b4a646242caae1987b501d7b704013cb11a61345bcce18
font_01_sfnt_off00011a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5B 16444 bytes
SHA-256: 0e90d533a6f8d6ed8e87d450c3dfc5d556033d7cab26ef12747b056693fa83a3
font_02_sfnt_off0001310c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1310C 21392 bytes
SHA-256: aa1824cebfd0f33bc8b599d7075e34336f923cd35df05414715829edcfb82d77
font_03_sfnt_off00016554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16554 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00017d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D61 3944 bytes
SHA-256: 97edeca741615d76d4041e7d1d3ae262e4530764ed1b5da682ec40ad63c5ae29

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