Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d475188b208d16d…

MALICIOUS

PDF

75.9 KB Created: 2021-09-28 03:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 711ae040bc3887fbd9b47c1823e562be SHA-1: 9801af2dd924e95e54e92d8f824f3896e5eff065 SHA-256: 0d475188b208d16d1f98323328ebb94cacd1bf4c531b589a84631b408b0535de
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for exploiting vulnerabilities or redirecting users. The presence of numerous external URIs, many pointing to PDF files on distinct hosts, indicates a link farm designed to obscure the ultimate malicious destination. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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://myapartment.de/web/editor/files/69701615922.pdf In PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/jajuxukijunu.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132870c092e1---lekisitowatozixuzuzab.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/21223233778.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/95402098322.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/vavafog.pdfIn PDF document text
    • http://nceed.kr/pds/userfiles/files/tuxotoloso.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/lavinewugupewevimosulil.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/81825091848.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/33736415581.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/nifuko.pdfIn PDF document text
    • https://www.shropshirefurniture.co.uk/admin/ckfinder/userfiles/files/24501421393.pdfIn PDF document text
    • http://www.louisianarebarcontractor.com/editorimg/file/kikosofofomeva.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/bawogomakoxagibatenovefi.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/libinatemegovo.pdfIn PDF document text
    • http://reylab.com/userfiles/file/38521954393.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/zeronefadulexuwevusel.pdfIn PDF document text
    • http://terfigyelokamera.info/files/file/rafalepuzitumixamewewe.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/60679029702.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/31738494521.pdfIn PDF document text
    • http://grupafurman.pl/!mag2011/userfiles/file/mikulakateg.pdfIn PDF document text
    • http://ccshecea.org/upload/files/53209017767.pdfIn PDF document text
    • http://pscworld.eu/ckfinder/userfiles/files/26243982447.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/mogezofe.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/72754265580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=zombie+fortnite+3+mod+apkPDF 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_off0000c04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC04A 18828 bytes
SHA-256: 6a396c3cee5c9138175498195ce7302fa65206cac0078e8ed798c6d9311121c3
font_01_sfnt_off0000f16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16D 10812 bytes
SHA-256: 46d5df7f22c10817b716f3869def621a3d051b3bb0eefa24a7571395a9677854
font_02_sfnt_off00010a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1