Malicious PDF — malware analysis report

Static analysis result for SHA-256 b44386054993d4b0…

MALICIOUS

PDF

80.0 KB Created: 2021-09-04 02:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 45dd066d70f960ee5fb3a89c20e0a306 SHA-1: 06ac5430e01ca37c1d9b2dce11fa6547d6d96296 SHA-256: b44386054993d4b054515701a0c45b47b4b825fa7a9bc726fc4ad759b2d0729a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document exhibits characteristics of a phishing or malware distribution lure, evidenced by numerous links pointing to compromised WordPress upload directories and disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external links suggests the document is designed to redirect the user to malicious content or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/046699a8e3a14a6e5566652a296dc99b/87665754793.pdf In PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1262c6f413---vapoponizepumububami.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/87581876231.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/4f4ae16e41c4c1197c3499e97504d9c8/28345347288.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/23200845947.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/senawapore.pdfIn PDF document text
    • http://proetcontra.hu/userfiles/file/burezuxuwabegi.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/ebc3371bdbe44b188f65c2e213a0e2df/92589698379.pdfIn PDF document text
    • https://brod-plovdiv.com/images/goxomupobiwed.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/c72d8ed1d41d969649ee919a5495fff4/vepal.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/48281499619.pdfIn PDF document text
    • http://hangquangauto.com/files/puzozifawewelogelop.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/11182284543764ed8d8c14cc1b4bd3c9/munimemifagobolorinibi.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-31/20210531224336352619.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/vikud.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/jaregeg.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/rogolidudolifulivegij.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a831fcf0e0b---nijofesomer.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/dotesixuwo.pdfIn PDF document text
    • https://loyallcanada.net/editor_files/file/70538842310.pdfIn PDF document text
    • https://gulyaskantin.hu/uploads/frontend/files/9558128549.pdfIn PDF document text
    • http://majesticcaliberenglishlabradors.com/clients/a/a7/a77fae3751d16767b5fd1969bdae34dd/File/goforoweni.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/vujuja.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b702f8ee83f---2318019874.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=ds+160+form+pdf+printPDF 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_off0000d611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD611 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 17008 bytes
SHA-256: ab8041e027bf3494fb5a78c52366e2c6d7af9a90e8c99738e2169ae66006ac9d
font_02_sfnt_off00011a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1D 10664 bytes
SHA-256: 58db5b6c2039a65f4d51490ba80326d7989120b904cb717e0160d3b94ffdffa6

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