Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16b06c48d92be56…

MALICIOUS

PDF

83.7 KB Created: 2021-09-07 20:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dd572c21746376d535b8e36509f49806 SHA-1: 3dbac15c4df9cbd6215aafe0677d3b7d0c00ca78 SHA-256: f16b06c48d92be56dddb79b3e3031a084ad2c001fd9d15b0ecdab1dccc9a3602
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • 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://cathugo-yachts.de/res/wysiwyg/file/moxilojofefibip.pdf In PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072e5b652961---78278514260.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/f913f7e546897e174eb454b969f1f3ef/dilivak.pdfIn PDF document text
    • http://insei.eu/userfiles/files/24752409629.pdfIn PDF document text
    • http://airfa.it/userfiles/file/rakawelidog.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/2k8upklq6ralbs3j6e3cetd908/47902181664.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/21001804992.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160856c21d465e---kuzonozivonozaboniwokajok.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/40455735121.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a30fbbb59e0---zegukisepotomejupe.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/adrefs40nbu2q3rvulh2t0peg0/pudunitati.pdfIn PDF document text
    • https://www.foundationofhope.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e387cad3f5---50244300158.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/liximusorupigivogaborafak.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/61717165752.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/sasomotejuganekezo.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/joderukojidafaxebosimid.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/ddba88b45484e579652e757d631e1a91/67375884170.pdfIn PDF document text
    • http://jhsclassof63.com/clients/c/c8/c8cc7cee7579ddcd469b669c0eb172d8/File/74304857196.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/25265832465.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d395af5fff0---zuwiloriv.pdfIn PDF document text
    • https://landbar.com/upload/files/xumokebowobufadubedegaka.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/xuwuto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=research+methods+multiple+choice+questions+pdfPDF 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_off0000e21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21A 11176 bytes
SHA-256: f0a722665f324de4f69e4f81af721ebbbaba5a14406b89f4e70896c641d4dd87
font_01_sfnt_off0000fbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E3 17364 bytes
SHA-256: 53295a6827f41575d2326e341aaa291c58e99c2c465cca540df04dfa5bd6a929

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