Malicious PDF — malware analysis report

Static analysis result for SHA-256 73f1ee27fe094ece…

MALICIOUS

PDF

86.5 KB Created: 2021-09-09 10:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 81f4bfdb83a684d8dd11a5927199f222 SHA-1: 38be1d827c90bdcae42636b449adc91a1ae31450 SHA-256: 73f1ee27fe094ece0b3bfcb95921d9104a0363fae3754ef6db4bea9ed38822d6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • 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://www.rajpuc.pl/pics/file/43068052581.pdf In PDF document text
    • https://transilvaniafishing.ro/app/webroot/files/userfiles/files/nebakilosokasedapivi.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/7469213098.pdfIn PDF document text
    • http://1-champagne.com/blog_images/blog_/file/rulokosunesitenuvad.pdfIn PDF document text
    • https://minjar.mebel18.com/uploads/files/6620761304.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/98008246614.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/40496447644.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/vefifomuz.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/43719340038.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613226e78b40e---wiluven.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/60166466992.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/fefipunadakir.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/44878305202.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/22495677280.pdfIn PDF document text
    • http://kdekdyjak.cz/data/6219968569.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/50536088132.pdfIn PDF document text
    • http://bacsionline.net/userfiles/file/lufetepajo.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/xazodekafobu.pdfIn PDF document text
    • https://tsegypt.com/file/kitufudipiwezulofojev.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/69942574860.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/dibiwakajeli.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/lomivejobogitizabaxuzusil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=kingdom+hearts+coded+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_off0000eaa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA5 19032 bytes
SHA-256: cc173dbcb7f9b059d3a81526aa076e4c969faac029dc5a3a5c34482c3290b15f
font_01_sfnt_off00011bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD1 11000 bytes
SHA-256: 7264fd747fe78827bf71a3fb31720a7d7f528ad5b35e2042ef30ecfff21beafa
font_02_sfnt_off000134f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.