Malicious PDF — malware analysis report

Static analysis result for SHA-256 a31dc9a7f5742db0…

MALICIOUS

PDF

72.0 KB Created: 2021-09-23 00:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 184945bac6623f90cafce9c3ab072373 SHA-1: fbdc43db78c95f350643db8e88bc86cff0416a19 SHA-256: a31dc9a7f5742db05a0231a4f429e4572e3b6b8acd82a4771157f50d09542aba
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address and others hosted on compromised CMS upload storage and disposable hosting. These elements suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://thamcohoaian.com/webroot/img/files/sawinifegifala.pdf In PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/u69d0ajqsd81ovfp7pr3u6ccq3/47797714015.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16147e9c43e028---14316742926.pdfIn PDF document text
    • http://ourconn.com/userfiles/file/202109130038174968.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/35924668151.pdfIn PDF document text
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/17963295921.pdfIn PDF document text
    • https://maggievanostrand.com/uploads/media/file/97161229326.pdfIn PDF document text
    • https://conexusinternational.com/ckfinder/userfiles/file/tikesuluzegub.pdfIn PDF document text
    • https://ardiinerkh.mn/uploads/userfiles/files/68571980646.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136086611991---66378585373.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/43069990015.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/zipikovesixixolukufipa.pdfIn PDF document text
    • https://varida-tech.com/ckfinder/userfiles/files/47226519323.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146d7a14bf02---gigaxowezikaw.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/161436cb41ced8---roboras.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/zigedimekikolidakuvowefe.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/6181112127.pdfIn PDF document text
    • http://127.0.0.1/bantraicay/js/ckfinder/userfiles/files/27056989654.pdfPDF link annotation
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/0f09e925aac4dc71a4cc821ee8f8cbe5/48256561988.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/zaxipakolo.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/71492152851.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/xudevigewaluseluja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=subway+surfers+ki+videoPDF 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_off0000b729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB729 16548 bytes
SHA-256: ed8ff7246542c787c2ffbc8018d15afb75fbfd44efc6e9b6b7bbcc74ba4c8cbc
font_01_sfnt_off0000e1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D4 10772 bytes
SHA-256: 048108ff1e8ce962654840063355aca6931b88ebdb703846b8da158c2a5e591a
font_02_sfnt_off0000fad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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