Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d31b1347e03d5f…

MALICIOUS

PDF

84.8 KB Created: 2021-08-18 19:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 23dfa89fff5e60ef62dc2abe8e271b14 SHA-1: 3a2dbdf339c7d67280912095a94998d6121e1431 SHA-256: 49d31b1347e03d5f51eeaaf91d5fee2f08d53eb4ab6da4d784e24e56fe5f8d7f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or exploit delivery attempt. The PDF_URI_IP_LITERAL heuristic indicates a direct IP address link, which is a common tactic for evading URL-based defenses.

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e9a5484c3---magexojufewiji.pdf In PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160e7c3717d115---tumumeli.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/66378e53487006e767bd4f8c173ad7ad/98904291378.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/lafasipavapisuvi.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b04c66337---33472615866.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/wibabuxojixuvipemiwefavo.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc03798704---xafuwojironujirawavura.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/33776380134.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/gevixozefovifagokinukeb.pdfIn PDF document text
    • http://music-saikung.com/ckfinder/userfiles/files/muteniwuwamakekipivutukid.pdfIn PDF document text
    • http://www.olivier-frey.ch/user/web/file/mewuvozeruzezamuzow.pdfIn PDF document text
    • http://www.enjoyvaltellina.it/admin/ckfinder/userfiles/files/tesadomaxiwafeki.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e0f872628---zifesu.pdfPDF link annotation
    • http://chinocorporatechallenge.com/clients/6216/File/15975742220.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/4acd13a6e8994cbdcbabaf076d32ccf3/xodisenojilufi.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/nabigu.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/ffde4f9efb78dc9d02ddac81d744cb17/44245420445.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/puzisiwelopavosadopipate.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c9a50d0a3---67278816874.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/4733a8160ab1a89f38365e624d7c817e/30419814.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/93128901578.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffdb065244---rikojeza.pdfIn PDF document text
    • https://rendiamovisibiliglinvisibili.org/file/83996943798.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/v46at1kb4fbg5ghdsgk37esrv3/70305993552.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=equate+blood+pressure+monitor+model+ua-4000wm+manualPDF 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_off0000e63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 17280 bytes
SHA-256: f195d15a717bcfd99677a76c039c43776e121c9ba720424e9d50de587ad214f0
font_01_sfnt_off00011320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11320 11244 bytes
SHA-256: 5b6f085bdeb0e733998d1a99d158c2d5dd0fbcfc78e3925b0d702ca0cd3b962e
font_02_sfnt_off00012d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1