Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11f5b7465c62a60…

MALICIOUS

PDF

94.6 KB Created: 2021-06-14 15:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: db35b2788dd121f628089bc8321e1db0 SHA-1: 4342f376f1044740b366f5b1dc7cc72ebd97eaf9 SHA-256: e11f5b7465c62a60ad769f81c0e13e0ad9187c11a851aeac6ce8bad8f69db9e2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting. These URLs are disguised as search results for popular content, likely to trick users into clicking them. The embedded links farm users to further malicious PDFs, indicating a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://krisoc.ru/uplcv?utm_term=raja+rani+tamil+full+movie+hd PDF link annotation
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0d9c51c5f8ff62a8b2c365d0b5a060d5/zezapexepulukusizunalanub.pdfIn PDF document text
    • http://isvpro.com/custom/files/tixizafu.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160971fa877834---75204980433.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c986d3ab1b---duzeb.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df12ba0580---56340713719.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/hjf48454lp3j4c8slfavot6og6/76529734306.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d8dfa166e---46152023109.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b93d43cf358---22681125184.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/3751591d4d7ba4da2e7b7fa4f7b10d55/pijile.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/rt5o0bhq9c0f5llloo0f9blnc0/xibom.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/c1d921fc4c0110194f71d45f778b94a8/tenonufijusorefidiwuda.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16092da710c139---15790715015.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/4he2f8e3mqdd0a6mvmuau3tcpa/37339608299.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/ff6dc61963eece8b0dec5b8f2ad0885f/70739407970.pdfIn PDF document text
    • http://parkwaywest1974.com/clients/861606/File/81530776990.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870b94e1bb4---29326678543.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F6 5112 bytes
SHA-256: b089af5ad58d9cb184861ae41ebeba9f70d1a4996a679a9a9b5b2b37102d1145
font_01_sfnt_off00010640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10640 3580 bytes
SHA-256: f0383e70ed262d1c705b1c0c9a7ae6be35e90a4906b08124ad42d967359b0b5d
font_02_sfnt_off000113e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E5 4368 bytes
SHA-256: 5693f53bbda19b05af40097f5a0d0d2c5812f515f9317c5604ab42265b21e003
font_03_sfnt_off00012145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12145 1656 bytes
SHA-256: a4d3e2272f2003312c2bdb969d5179081f3d6bccce47945384e713583b88398e
font_04_sfnt_off00012992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12992 11688 bytes
SHA-256: 6879c7b18e118b18d3ea3033819d87405251935a071975e7e78fa00846c32763
font_05_sfnt_off0001517b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1517B 2684 bytes
SHA-256: 064d3b6e5f01eddddb01c4d45c71af3854fa1c596904f6d06fc54c7b448c6eef
font_06_sfnt_off00015c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C31 6068 bytes
SHA-256: d2d8c0267ae40200b865a701fa4111f3734e829580eae3b14d582a70f98b2391

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