Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e72a5ff27442cd3…

MALICIOUS

PDF

66.5 KB Created: 2021-09-01 12:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3a7a26a323b72ac47ae7c38bedc2dfa2 SHA-1: 61c8f68d3fc97f7f630fd9a879393e2d7e6d2d77 SHA-256: 6e72a5ff27442cd3dd9639567442add6dfe86e1d48f2b80db2fd0e383a6de20d
194 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5224

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/8vnktakc8j7r4iff3n1ha1ggv7/33715986915.pdf In PDF document text
    • http://tion.hu/upload/file/pemerumaj.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/buwidoji.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/52qh8jkituhush1l4tca1rn5re/genogevuzaworitafarowuda.pdfIn PDF document text
    • http://www.marjojaspers.nl/ckfinder/userfiles/files/15389639827.pdfIn PDF document text
    • http://yilip.net/userData/board/file/lokarepi.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/tuzuxopukoregapadi.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/171658185423.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/26265251562.pdfIn PDF document text
    • http://majesticcaliberenglishlabradors.com/clients/a/a7/a77fae3751d16767b5fd1969bdae34dd/File/56152043919.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/bofetijokimimarik.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757d261bc66---60384797721.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610371ccabdc2---gumawunadamabirebupovufar.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3dfa86989---35035059223.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/e8f855236edabaf2ac938a9d7b82d123/21326779722.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/kunivuvo.pdfIn PDF document text
    • http://inoxbienhoa.com/upload/files/mabela.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/24096298613.pdfIn PDF document text
    • http://hepiran.com/cache/fck_files/file/54284908962.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4kptj4irm218vbvr97na60pb73/vimifiteziwigovi.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6835bb0aa2---90573410404.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/mubagepafojapixof.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/59745ebd89e708d641eabac59e9f0483/28577965515.pdfIn PDF document text
    • http://www.childofafrica.org/media/userfiles/file/gibotux.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/vuletamebitim.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865e37a332e---zimisizogarabobivozapo.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb60bd32b5---govez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=writers+at+work+from+sentence+to+paragraph+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1