Malicious PDF — malware analysis report

Static analysis result for SHA-256 5494534863636390…

MALICIOUS

PDF

84.9 KB Created: 2021-09-11 08:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 114711a8d125646d6d6771fd4e93e453 SHA-1: 0b0857a5aebb7b58ace87400f9b402e6a2b8110e SHA-256: 549453486363639054bfd1aae7546a631c6cbf640477e4478c6450384f1ee197
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, with numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://ttmplus.com/userfiles/files/80615417761.pdf In PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/waxafigakiralobema.pdfIn PDF document text
    • https://gentrilieu.vn/userfiles/file/69777438573.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7a891bd0a---31387662696.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210911043759.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/62301880509.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/1930096444.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/wutajaxitoxusof.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/2445d85d0646fb5e1e7749ff2e347407/94072658558.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109101054162027.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/vpm30uanj5omkigg52i4ffokg2/26784859800.pdfIn PDF document text
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/94784038078.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/f421el55mgfcllstrioplae1jn/56209212656.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1630901011.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/93041918023.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/lobegitarewagepevaporima.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16132796f65aee---dukagelivoj.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/gorip.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/79810321723.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/47328930289.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2e640be04---93083586287.pdfIn PDF document text
    • https://mauspro.net/upload/files/powonovijafekotujeneb.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/77543342181.pdfIn PDF document text
    • http://op-gold.com/ck_image/files/84799794281.pdfIn PDF document text
    • https://www.tcf.gov.tr/ckfinder/userfiles/files/31386670587.pdfIn PDF document text
    • https://enilubricantvn.hoakhanh.vn/uploads/image/files/96805726269.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=android+png+to+jpgPDF 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_off0000eb6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6F 10172 bytes
SHA-256: efd8bb45c8aa0a72cbeab60567fa5f3dace413de34e93c248c8833b8d2775905
font_01_sfnt_off000101f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F5 16828 bytes
SHA-256: cb12d43f208bf58a50b7219b12ac80ae0687f0a6f8688373be36f50e55a8a92d
font_02_sfnt_off00012ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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