Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74e2206cb6a5a1f…

MALICIOUS

PDF

77.4 KB Created: 2021-10-09 07:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5d3a1b2ebf7174a403e8e3ebb7d63561 SHA-1: bc7fe53e7e3e92a5c7c9771a3ce9e3d7fcbb6c39 SHA-256: e74e2206cb6a5a1f4b14bfb3f76b2048b7bf57cc95500d8c6c4c7999116db2b5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. The presence of multiple link farm heuristics and numerous unknown reputation URLs indicates a strong attempt to direct users to potentially harmful content. ClamAV detection and ML classification further support its malicious nature, likely serving as a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 https://guptajimarriagebureau.com/userfiles/file/30448267276.pdf In PDF document text
    • https://samsungklima.net/upload/ckfinder/files/likedopi.pdfIn PDF document text
    • http://www.sainteuphrasia.com/www/js/ckfinder/userfiles/files/susawa.pdfIn PDF document text
    • http://0953057778.kad.tw/kads/ckfinder/userfiles/files/zaxoramesarigena.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/xaluxa.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/lipaxivovaxajadud.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/vs5d30k6fu31a7c2tuo54ijuvs/47144400272.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/fabakuzujemapiremuzos.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/wuzapu.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/tevuwipasonolowubefefese.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/50441766685.pdfIn PDF document text
    • http://happyorderfood.com/uploads/files/jelezoxi.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/66919393273.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/xolobofikotuvilabuf.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/dokekaxabidumixoj.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613dea747d9e1---zuxafewegowawipusifujeb.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1615c5f2a034a5---gerekebofijovokipivemijot.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/tudij.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/d97250736bc8a1562d36cb3cefab7b12/bawivodonijowik.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/xevesozisejorife.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153705a726c9---bomitonebogadusugineba.pdfIn PDF document text
    • https://leciv.fr/uploads/FCK_files/file/99493120008.pdfIn PDF document text
    • http://sandlnae.com/data/editor/file/jidunoxuvelevasa.pdfIn PDF document text
    • https://somogyplusz.hu/files/rizirifulagew.pdfIn PDF document text
    • http://thriftstorewebsites.com/flash/thriftstorewebsites.com/file/bogetagab.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/fozulupupavunir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=lodash+filter+array+of+objectsPDF 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_off0000c851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC851 17640 bytes
SHA-256: 6c6273a401144d0c4606a10ae9885ee6c38dd783533399fbf7366fa4ad635951
font_01_sfnt_off0000f68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA5 10812 bytes
SHA-256: eb3e084551a16dd3808490e525d3adc0617457d5f21a37d7aad6a9be9f88f01d

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