Malicious PDF — malware analysis report

Static analysis result for SHA-256 06744b52f2ff7530…

MALICIOUS

PDF

80.7 KB Created: 2021-09-20 10:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b89a364c4b9194b16aec9f8f1b5ac399 SHA-1: 5e1224d8913db4f8516ada47659df5202666efa3 SHA-256: 06744b52f2ff7530ad40eb9f25b9b468bd6e3e7b8e423321d35ed63c78eb7d01
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of links, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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 http://jan-fotografie.nl/upload/files/52617059292.pdf In PDF document text
    • https://santa.sg/images/users/00000000/files/bugonaxomutejigilut.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/33106951911.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/55488837005.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/mirojosimopamovizafuxe.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/jinutomixaj.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/37654129041.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/gazalagagoxezu.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/3220192344.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/jaliturobimibisodetituxos.pdfIn PDF document text
    • https://linardi.ru/files/file/34684454775.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/xutirofiveza.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/57e0f994e5c71a628391db3601188a3f/11544675926.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/41536580284.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/kilifugakavemilo.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/xiweb.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/terumupofapobanibe.pdfIn PDF document text
    • http://rosniyom.com/userfiles/files/roketapajegazabaz.pdfIn PDF document text
    • http://solentpodiatry.com/jackvl940/web/content/images_uploaded/file/27598703869.pdfIn PDF document text
    • http://www.pvvc.cz/files/72539505391.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614202096fab9---63546722277.pdfIn PDF document text
    • http://gz-chengeng.com/uploadfile/files/jerubukotudisixe.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/93794576308.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/56180245811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=sims+freeplay+hack+androidPDF 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_off0000d55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED71 18076 bytes
SHA-256: 01cc83f0c0bff1bef96d448f94798b2a2a8ba51721200a99196ab8105cf69369
font_02_sfnt_off00011bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCF 11068 bytes
SHA-256: fa90ba4aa1f7b708b779612b26004ac9598ac2bfaf4ee17251272701f5fea549