Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b2032bbee81963…

MALICIOUS

PDF

80.1 KB Created: 2021-09-20 14:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 32c9a6aa69a6bafe63ed6df9a3337eb7 SHA-1: 5f63da242d38b7d8fe870fa240606f5a58e18b74 SHA-256: e4b2032bbee8196321b82e5a0d76a33fb6898aad3cc9bde80ed6fd53e7acf545
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate the document functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised or disposable domains. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=logan+lucky+putlocker PDF link annotation
    • https://theshamrockpublecco.it/file/mozunoneperuxefamivepuw.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/46963067126.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/bc36fb2645d29a981332bb9dd2c56312/46157647887.pdfIn PDF document text
    • https://thibiditrading.com/public/userupload/files/96281487028.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16143148f59692---23916861324.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/takoz.pdfIn PDF document text
    • https://manenshop.com/upload/files/93913596726.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/75895460769.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/98839552379.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/91857642777.pdfIn PDF document text
    • http://galenbio.com/images/upload/file/75914782519.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16141c92838878---xudipivijijenodapumefuwi.pdfIn PDF document text
    • http://www.likoda.com.tw/upload/ckimg/files/refoguduzu.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aeb91bed0a---92143364925.pdfIn PDF document text
    • http://bzws.zhanyougame.com/ckfinder/userfiles/files/28813373444.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/gokidezidevimefodava.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/towiwubibadabeleboxolilum.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133991d5c8ea---1380713740.pdfIn PDF document text
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/37116919269.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/9dpfap0j8pr35ib6f2vdhe22g5/75108234650.pdfIn PDF document text
    • https://labelmarket.eu/data/file/kateturozokijiroxosan.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/sksp1mfmepsm9fc2m5idfatusu/1647684754.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/vedafexeposovenus.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_off0000d362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD362 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB74 18160 bytes
SHA-256: 96b3e50a9fd6804667979431460f43bd8587015b8221e7c3d18ba89812d4e7ac
font_02_sfnt_off00011b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B00 10552 bytes
SHA-256: 2e6a8edbf2892c4a314d7151f50474e860e93746397d77c31136e8c5ac43624d

Open this report in the interactive analyzer, or submit your own file for analysis.