Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42cfd3337311f10…

MALICIOUS

PDF

79.6 KB Created: 2021-07-29 18:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b2e8e01d6f7ffc7b43941fc7a6ced8cc SHA-1: d3056763ef43d9e0a47b047b46269bb8a87bd627 SHA-256: c42cfd3337311f1030fd6f23ddfef4dcad39ab4052d70e40ac6560441a6e85d0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features numerous external URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9be7bc4dc---23416726875.pdf In PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f2f03c93b---jazuronofol.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/66810168147.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/1c0d6dcb110474a953a6430d40e7217f/2126633176.pdfIn PDF document text
    • https://mashura.co/userfiles/files/fominotitelovotusuxox.pdfIn PDF document text
    • http://digifast.cz/userfiles/birafisesafuboniwat.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/05921ef0ded9c1dae0a412e909c86f3b/83996263867.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/c4ff6ektcno03cvrqpgpknnkvu/pekapelirifififepimuwari.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/kepoka.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160796c52b39f9---busefepikope.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c947be61e98---wodomevudanokawajavomidu.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/22583226647.pdfIn PDF document text
    • http://sanders-scottfamily.com/clients/26926/File/rotogolakot.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aee3627778---gabowemiwemuwawapa.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/p2n2qntvmlv1g84ans83uqjv0n/nelawem.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/38460edfcc0d552f7bed0eca84cc8e58/sizejizapewopiz.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/4e2252f6923dc7abbd15b1fccecbb2db/54643288527.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/wegezotaregom.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/darazigasakig.pdfIn PDF document text
    • https://juegosinflablesarizona.com/files/vimerijetavujulugim.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/53402056225.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/67835835800.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/5287790994.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2857b0f211---kovagogagebazeteginusaxa.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/25c1fb63273f8f8d01d8660836edc2ae/17194928038.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/b78140cb7aea176317e46201eb4b3671/79605056509.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/aa68a9256cfa4633c1192abb605f2a1f/miman.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=te+voir+lettre+jesus+adrian+romeroPDF 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_off0000d17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17E 18092 bytes
SHA-256: ee811ecddcf01031b66a85de2d4ea9ee9f1534d56d6f549e9d64aaeb702209e2
font_01_sfnt_off0000ffdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F3 10668 bytes
SHA-256: d311340067c14f6452c3798dc3ea60d6f7f87f3bd2c27b108a62bd78a05e02bd

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