Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea7b511bb3d0de6…

MALICIOUS

PDF

90.1 KB Created: 2021-07-23 19:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20d9e2457282d6d5b41dbcb55b59044d SHA-1: 3b8adb19a05b91e93d22b858045958f74ee3c631 SHA-256: aea7b511bb3d0de6ccdf539a38881b5cd0aca641000112a1d973044f3acbd6dd
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It functions as a link farm, directing users to various compromised websites and disposable hosting domains, likely to distribute further malware or conduct phishing operations. The embedded URLs and link farm structure indicate an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://ebooksweb.net/files/file/26660744059.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/e2781e9928bf40eb60a247420fbec415/4839949693.pdf
    • http://mishelik.ru/userfiles/file/90123989728.pdf
    • http://zulaikhatextile.com/userfiles/files/sarudawiduforinanaxa.pdf
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/78256745572.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2132f4388c---90373582263.pdf
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/71921011993.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160759c0cc63b3---dizomolo.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160779fa9c4044---99499296035.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/vmlcoka47h12aa2d2c8igj0leo/41024846540.pdf
    • http://zonazero.es/userfiles/file/bexozukoworenud.pdf
    • http://hagelkonzept.de/userfiles/file/turinezumomuna.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/8b2vddvchicv2jejb68su38vgu/65776336943.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/hjlskjo10ih0l18jiirnjrni52/92063396166.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d1196be81---79801178150.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826a366c088---topuvojesosigozorijejif.pdf
    • http://wang023spa.com/userfiles/202106file/2021061718353670554.pdf
    • http://skikk.be/app/webroot/files/userfiles/files/92929649673.pdf
    • https://trimix.bg/UserFiles/File/gazazikikewu.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/b42bd9f52a9e35f440cea8fc6986265e/54168376993.pdf
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/7420368760b9ad6f6ce04061a27e7811/foloxexaguwolu.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d56cb4683d---jovukujesamuzore.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/4a604b32de580377162297c4134a0b19/10453648766.pdf
    • http://tuzvedo.hu/elemek/file/genivufupusukejirirododav.pdf
    • https://villamishkan.com/310renonew/front/images/files/91164630681.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6eeeca603b14f69fc0d950f1536675b9/xekaxusepuf.pdf
    • https://vieclamxaydung24h.com/upload/files/19327909335.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=monster+legends+2019+hack+mod+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae9.bin
3b24b87b673879d5a1d897698a922520839281f567554662247188bc43f4b8ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE9 16800 bytes
font_01_sfnt_off000126b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x126B9 16792 bytes
font_02_sfnt_off00013ed0.bin
3373471304090352301414e39c9893705804ace8787d11e30b8bea96be07d70b
pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED0 11360 bytes