Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f48cbe144afa34…

MALICIOUS

PDF

86.6 KB Created: 2021-09-14 15:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ecf2a7115d2f1752415563369092965f SHA-1: b7b3235a2def67bb34af45eedc44270ee248df93 SHA-256: 69f48cbe144afa344ae782e181fb2a57a41846959df80cf604d44371b64c2aa3
164 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The numerous URLs point to compromised WordPress sites and link farms, suggesting an attempt to distribute further malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=mobile+screen+lock PDF link annotation
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d886611e99---53659664136.pdfIn PDF document text
    • https://leonardscopysystems.com/home/leonards/public_html/ckfinder/userfiles/files/41237154486.pdfIn PDF document text
    • http://kamienneogrody.com/userfiles/file/zegapogirabosu.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/10282329742.pdfIn PDF document text
    • http://ih-consultant.com/ckfinder/userfiles/files/tanosatabi.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/1ut53qm37r9l3t2a3s63mr7og5/xekexemusebelidij.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/ramekudomaxi.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/nasoxawepo.pdfIn PDF document text
    • http://phubozena.pl/userfiles/file/53886610942.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/23932404604.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/c0c73dfed58717773cfebd724189b29c/70449969191.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/28663445906.pdfIn PDF document text
    • http://blccy.com/userfiles/files/lasuretiwabut.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/zefina.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/rodotuwatunuruwapitiref.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/10232231478.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/gusezaxafodusatosarikip.pdfIn PDF document text
    • https://tiemhoamo.com/data/dulieu/files/woripuvem.pdfIn PDF document text
    • http://hillcrestneighborhoods.com/userimages/95899853139.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341df5b5350---xetixoburizipefilifeweko.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/timupesojavo.pdfIn PDF document text
    • https://nieruchomosciturystyczne.eu/files/file/26692031299.pdfIn PDF document text
    • https://lorus.rs/files/sapegodamixufowaxib.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_off0000f07a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10891 10188 bytes
SHA-256: 63cd25c43234e89354245803880856002aef55bc2c525437b3c6b1682bc6e873
font_02_sfnt_off00011f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F7C 17552 bytes
SHA-256: 8d53e0cf1df883284fe8899047c9705eae67b8ee350830a2c60c249b33828b09