Malicious PDF — malware analysis report

Static analysis result for SHA-256 3041756b3ac3c111…

MALICIOUS

PDF

99.6 KB Created: 2021-08-10 07:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eb4c5bd4445c71af18807305a5b0dfe0 SHA-1: 13c02a67e7537ce8bdeac4dd1967a92c8889627e SHA-256: 3041756b3ac3c111d777ed5fbfb024e8e985b4ee5c18d06284ec5677f51a4d1c
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to compromised CMS upload directories, suggesting an attempt to host malicious content or phishing pages. The presence of multiple URLs hosted on potentially compromised sites indicates a distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/hm0ddjkanv0cj2eqqnmvur1vug/77344888033.pdf In PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4ea3edc07---vosugiruziretabulegad.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/944b1vaf62udhcjthm0hkaprsd/6707137354.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/fetazitog.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/gadareputijevuzidugokut.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/532dffd029a5a0a099619458ac1a2713/vimawikozalug.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/70308354336.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/806a195509d255ff64214a3a18270ecf/xawededakoriwaz.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d2fadd4bc9108c60fef0eb33eda369d5/67748957558.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb68fb9305---lojagetofufojawexesu.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1bead7143---tesenamekifow.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/c5987945549b110afbdf499fc365149e/xeduwudofifef.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865670c1c42---16718792550.pdfIn PDF document text
    • http://immopolignano.lu/images/42319203732.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/18038182093.pdfIn PDF document text
    • http://gokea.org/upload/editor/files/36008204658.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/380c2cf52c24e1f4366a2b0a9dfa9993/87381266835.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/jotifug.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/70eff3b5402e506bcce1a8291942e12b/pifejugepaxojiku.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/c4a08cce48352981e166e02012314c49/fefimopaki.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/volusibetugozer.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/tj6sbmb4kphhjimoqt8s5p17ca/54888471837.pdfIn PDF document text
    • http://geotersrl.it/file/zazimabituwotimak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=frases+de+dios+en+ingl%C3%A9s+y+su+significadoPDF 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_off00011f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13781 17736 bytes
SHA-256: 7410c641d7eaaa73f7deee31c3fd5ff248f2205cc7aca4aef73e18211beb5962
font_02_sfnt_off0001645a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1645A 10900 bytes
SHA-256: ea4ef911414dc727d5e1e6326ba6bd60d05c0b6b88ffabbd036b5f5fca8a4a90

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