Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7595054beb0101c…

MALICIOUS

PDF

90.7 KB Created: 2021-09-01 22:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 889878f5ada67b48a54e0b1000c7adab SHA-1: 64ee36ebb77021128a87f32d74f24adaa7e6607a SHA-256: b7595054beb0101c32ab035a85d1158b262090ea7b8dfa238ada4945c19992d8
196 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to download a second-stage payload or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/fll8d3cmuh6itrmqv18jprfluu/67980058112.pdf In PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/kejalube.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/zederosomakurivedero.pdfIn PDF document text
    • http://assytekservizi.com/userfiles/files/85489571807.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/t6669i7gs29u6nb4vp5bgcouqn/99581896942.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/wefurogavexop.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/a2a7d80373f45f37eaeab226712058a8/3849586183.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/28149237800.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae11d0b3244---jujitorofepibupukatap.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/e4dc5779fa26f38b8c59390b2165f0be/zetukewuxupod.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/52919795428.pdfIn PDF document text
    • http://jnejendomsdrift.dk/userfiles/file/85993452195.pdfIn PDF document text
    • http://podolsk-kondicionery.ru/upload_picture/file/kevazibanonaditoramutaw.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/27391929439.pdfIn PDF document text
    • http://bowenworktimmins.com/clients/e/ed/ed750a77e36579213b976c45729ba45c/File/gobabumebufexujokolobo.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/161216e9b73330---xasaraf.pdfIn PDF document text
    • http://menafundinfo.com/userfiles/file/lezutifi.pdfIn PDF document text
    • http://songiadahoaian.com/upload/ck/files/15495337455.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7b4b558143---wilopegivanamivejoxo.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/ramofogaxitipamapifitew.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62279969172.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/41536732078.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/71734564425.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=henry+cavill+on+christopher+reevePDF 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_off0000f6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FA 21004 bytes
SHA-256: dc5a69cf2908c31577395f014dd4b0b3d4bf1dd9a1da47b4093105614e007285
font_01_sfnt_off00012ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA1 10640 bytes
SHA-256: 68c6cf1851c8e8f56e6e6084c0355719a2e23e7210b47ac0cf60ee29500b7c75
font_02_sfnt_off000144ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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