Malicious PDF — malware analysis report

Static analysis result for SHA-256 241410340739099e…

MALICIOUS

PDF

74.0 KB Created: 2021-09-03 23:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1a2d2203e525a819fb552d5516d7cf9f SHA-1: 1080551ded5c65dbc09d7743a042e4da42367bb0 SHA-256: 241410340739099e62d40ec0bedec672c430d743fc41e5149ff53172ac2fea7c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS uploads or are part of a link farm on disposable hosting. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are designed to deceive users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • 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://medvor.ru/uplcv?utm_term=lernen+deutsch+b1+pdf PDF link annotation
    • http://bugaboo-buffalo.eu/UserFiles/File/54279291591.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/201ca1245cfbe4cab8558604804cd636/retonufofilidesirika.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160777b5f9321f---10699594320.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608afcc03b99e---vizaletimezimisabawal.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/pitejibagirevid.pdfIn PDF document text
    • http://lovesenergy.nl/file/6366667905.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110a82705bd5---betamez.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/66220678224.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/kebufodosawaji.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e03bd053582---4326045458.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/98758884191.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/128209628.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/26098897682.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/file/ririboximesibubenajokot.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d8c7849a1---paxefu.pdfIn PDF document text
    • http://schokozentrale.de/idata/77959817395.pdfIn PDF document text
    • http://mindentudor.hu/userfiles/file/69302917896.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1624650887605382498.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df41e380061---82817116885.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/44e38b4de5141280d0b020ea09c68839/97138469499.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///tixumepelag.pdfIn PDF document text
    • http://msamericapageant.com/clients/873634/File/72051730308.pdfIn PDF document text
    • http://iccarrentals.com/files/file/10925088480.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021062812011965.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/4ca7cd570f500a8d89041abb6775c038/puzif.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB7 10548 bytes
SHA-256: 1690d1be5bba0d5531ae96c0b0a37281cb3333c6a9e971cf9aa98ab57926c95d
font_01_sfnt_off0000d581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD581 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED93 17476 bytes
SHA-256: dae5957a10f3d12c73b4c02ba59fcfb2af6bb95cb96f57f9801a784df1e8877f

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