Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ed8db9e6a31895…

MALICIOUS

PDF

80.3 KB Created: 2021-09-09 06:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 00e0f9164266fc783e5bc1f3444d277d SHA-1: a635b1ed165447ff5c63306bbefd6441f8680a75 SHA-256: f2ed8db9e6a318958638670596a319367cbda0c2e6b73272d691a7b2d0372980
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised websites and potentially malicious content. The primary purpose appears to be directing users to external resources, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://coretry.ru/uplcv?utm_term=bully+android+highly+compressed PDF link annotation
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16131feef07a6d---zalexeni.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/jiwowat.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/36599167916.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613951ac7c223---23647304909.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362cf254df3---xerawetefuravi.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/57554057739.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/36180462644.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161393682de823---78256727078.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210905115846.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/wozadokufep.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139141d7ba87---30385831512.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/55910562922.pdfIn PDF document text
    • https://visualarchive.bg/files/jogutuderabafi.pdfIn PDF document text
    • http://rileyillustration.com/images/agency/files/80283135581.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/17286268129.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/1c52a53dc5aa74353eee253123750e3d/sexulitevaritifegakuguri.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/43470755881.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/jozovemubabatupasetude.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/lorivofoderuwoxetatimerab.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/xuwerijobomifovavojeb.pdfIn PDF document text
    • https://majubesar.org/contents/files/lijebamanozevogolibive.pdfIn PDF document text
    • http://lactopad.com/uploads/files/tarofozopaxij.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/36636998776.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/zixanorevuwovurezakixu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD467 11128 bytes
SHA-256: c53c8d09d14ba58af113e3655262c69cf05b03bb5be8e1c3c4e2ee05234df689
font_01_sfnt_off0000edfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001060c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060C 17380 bytes
SHA-256: 99c934da551f86cfd250553921934a9f316747db01cc7f3b7a2361cb5a6e561b

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