Malicious PDF — malware analysis report

Static analysis result for SHA-256 0725384a3ddf35cf…

MALICIOUS

PDF

87.5 KB Created: 2021-09-04 08:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ecae11ea853d1d656f1b86f29fcc2b7c SHA-1: 106ecf8f9ea24cdf54aaf087f9f591827b6eb334 SHA-256: 0725384a3ddf35cfa4ba2eddf2896bdbd09861e6f5cdc24e655b9fb5763f4592
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites. The ML classifier also strongly indicated maliciousness. The document's structure and embedded links suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/vm1g65vcd7b11lgket7serj200/jinegiw.pdf In PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608bccfb5cd4d---xorugejomupipuzotovot.pdfIn PDF document text
    • https://maffart-guy.com/userfiles/file/88496283802.pdfIn PDF document text
    • http://gabortech.com/admin/file/xibonixavofer.pdfIn PDF document text
    • http://nkcophs50threunion.com/clients/0/01/014062e559e26c1cf0711bcec4e573ae/File/64035607530.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/zinunaduvopubaxaziroje.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16071e09613269---sokaluf.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/88416787750.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210725054256_id1t0v.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/jonup.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/58b452c8b4d0e86a207c79daeb0c8016/72170932028.pdfIn PDF document text
    • http://baominhlabors.com/upload/files/fadimagenaboro.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/1ace1f79cf405b90729fb79798dd923c/xoxezesexadegosafez.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/nawiwotez.pdfIn PDF document text
    • http://digifast.cz/userfiles/dubisowibamukixarox.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d20fd9882---96305280202.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/dakogijefofevetamiruk.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/05qmgtuufkf8f4s5kipcu4fuuo/vudesijenowonixupujopojix.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/1cebeacf5d2d704e9a8bde6c4dbd717a/nugetovepilob.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/40931009185.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2ee67a1145---1555039976.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/85144046698.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/20996611606.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=bonus+act+2015+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_off0000ef06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001071d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071D 10824 bytes
SHA-256: 9d66de2e14a20fbdd67fdb4751978565c8623e212357834222478a68c21c17f3
font_02_sfnt_off00012066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12066 18448 bytes
SHA-256: 7cd51c8edc785f6476aeb3e49e406a31550a2c4eeb159f82aa84aacde5352e0e

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