Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe230806f0820c9…

MALICIOUS

PDF

73.3 KB Created: 2021-09-05 00:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d164869c3d1cc2672059e40593e0948b SHA-1: 7d7fa8eb182416deb1f48ba7d29c70bce8787fab SHA-256: ebe230806f0820c92679ec255985f368594b9c862d641c2b7f71bdd36f5b60e5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or link farms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's purpose is to host a large number of links, likely for phishing or distributing further malware. The embedded JavaScript, though not fully analyzed due to obfuscation, is a common vector for exploiting PDF vulnerabilities or initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://allytemp.ru/uplcv?utm_term=the+silver+eyes+pdf+free PDF link annotation
    • https://fnb-concepts.com/images/uploads/files/84382124091.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/xodabakaluzures.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210620225651-kivulonibimudibevuref.pdfIn PDF document text
    • https://xn--80aggmy8c6c.net/UserFiles/File/xalasaluperibitar.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/1f713725c9a199de39e95d8c4687b089/vapiranosemefij.pdfIn PDF document text
    • http://vattuxaydunghl.com/userfiles/file/18026643700.pdfIn PDF document text
    • http://twinmd.ru/userfiles/file/ditubemeragol.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/48167223669.pdfIn PDF document text
    • http://loaamtran.vn/files/usersfiles/files/fobofumijugumosunijodunel.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf7755aabc---tigadatifedelufubaxud.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/a209f7456aadde8bc09d2f48080be383/78635637576.pdfIn PDF document text
    • https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/takamas.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/88206139325.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e65807bd47c---talafujafoxokagulerevebu.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609895f97352b---60206895140.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/kumesijopafokijulabed.pdfIn PDF document text
    • http://sentralperdana.com/file/zukavovekoki.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/3b5172e171689f675d7938bac61ebb96/nutenifinol.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/gebavutirotanim.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/tigufewarusofisiterevipus.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d613ef94c---zokatet.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/19d9c8a870ea696ca8dff8203840ba68/26525971938.pdfIn PDF document text
    • http://ilkemymm.com/image/files/69719773409.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/vapixagaz.pdfIn PDF document text
    • https://invest.pl/userfiles/file/7974907064.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://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_off0000c08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC08C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 10256 bytes
SHA-256: 351bd632ea526ca83e24099acbae742e3f3214ce2a87c54d76d7be7b4f32bb3d
font_02_sfnt_off0000efc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC9 16320 bytes
SHA-256: a550bd8db039c734a7b3d353487d3de667551787e78ba2e484be1b6765551f2a

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