Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdede0e816325dfb…

MALICIOUS

PDF

68.5 KB Created: 2021-09-23 12:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a14874f4479fc477e976d70cce02854f SHA-1: 268e462ae0f55812c86ada7ccad285de4ec29e4f SHA-256: bdede0e816325dfb3a8516966fe15d39207282d5fd90c1454519e3daba9ea2f4
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing clickable links to external sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/080349141532.pdf In PDF document text
    • http://12shio5.com/contents/files/nedojaxosigarafefez.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/1554965605.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16132dddb9b6ae---47695351120.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210922_161307.pdfIn PDF document text
    • https://toscanafantastica.com/userfiles/file/nozewezemulomowafikara.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/35878346540.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/samovuwu.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/lexejugugujagomegora.pdfIn PDF document text
    • http://trevorhannant.com/25573677064.pdfIn PDF document text
    • http://ets-sptk.ru/pic/file/37912642879.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/wufeperarakijuwak.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/4c7c318b9a794058586744bad27b0d86/naxadibenadariluk.pdfIn PDF document text
    • https://pellevah.com/upload/files/runadoxinazogixa.pdfIn PDF document text
    • http://rainternacional.com/userfiles/file/sakoruvamam.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/7859094558.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/vidosopelozavifumonupozu.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/kabofonefafime.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/37394854076.pdfIn PDF document text
    • https://phnews.ro/files/file/gunamujin.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/jujawafowu.pdfIn PDF document text
    • http://ashioke.com/images/library/File/51753568467.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///lasuvumup.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210915110147.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=zee+tamil+now+showingPDF 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_off0000b1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1C9 14112 bytes
SHA-256: 0f78c4df312cab7135d0e0e54c1ffbb2f9da4986b06bdef77a185b9e1ba6be5e
font_01_sfnt_off0000d482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD482 10504 bytes
SHA-256: 7211280705598e3d3f67b70af93a8b1d72865138b8625bad39d3498d92f196aa
font_02_sfnt_off0000ec4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1