Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ae1c7bdd431f97…

MALICIOUS

PDF

92.7 KB Created: 2021-07-30 03:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 05eae21e8d53c37614d8dc91f28a0b1e SHA-1: 2cd20d5d50678607d6878d13ba70c0e051769410 SHA-256: 69ae1c7bdd431f9740783aeeb5a28143875d3b27fe25f45801a6abe9cd464082
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites and disposable domains, designed to trick users into downloading further malicious PDF files. The heuristic firings indicate a high likelihood of malicious intent, specifically related to URL redirection and phishing tactics. No scripts were extracted, but the structure suggests a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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
  • 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://laborke.ru/uplcv?utm_term=psilocybe+cyanescens+grow+kit PDF link annotation
    • http://ambulatorioveterinariopisillibertozzi.eu/userfiles/files/fujoladidijege.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/87533598213.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160995a8cbd386---51790728726.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073bb8145190---didizebatizotusunevoxoxa.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1116776c3---81388052376.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf7e4281fc---kirotisebilan.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/8878019877.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/7aef9650d13721be5f2e39f26410f41a/wuwexidunovitulajage.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/72625596438.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1be382612---josalowif.pdfIn PDF document text
    • http://htwy.com/upload/file/96073729525.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c910dd9b6af---norimef.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd7c675d12---melusifeto.pdfIn PDF document text
    • http://boxethai38.com/upload/file/nitolulapirisazasegoz.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786e382be1d---jipetiwole.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e4508281b5d---kexoxadidus.pdfIn PDF document text
    • http://nutrisoilvietnam.com/upload/files/dabomusoxanawolezuxume.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/35129171854.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160df36ef45ce1---guseforate.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/64824913758.pdfIn PDF document text
    • https://mimpi1pusat.com/contents//files/jimexud.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/2a330d06d977330f6e0bb0eb3fc63da8/lutedidetagufuwiziletij.pdfIn PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/jideritijago.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/40637685051.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/dubosubajifigekujasajak.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/dd340962027e533362d516c7cdaffeb1/11164192673.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_off0001036f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036F 18208 bytes
SHA-256: aedb940df1244881bc42fa7c47bd9a7336422da7184681221d85f8f8e916a89f
font_01_sfnt_off00013358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13358 10840 bytes
SHA-256: 3286c4f89bf6cb4ea9614dc0805d5a8f0f4aed072efe7b07e5e55c3302142a58
font_02_sfnt_off00014ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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