Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e256724282cfbd…

MALICIOUS

PDF

75.9 KB Created: 2021-09-08 13:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 21f20ceebe76a2ea1fd6fa55460d03c2 SHA-1: 5047fec71805c3e7ec64a8dd5cccd77569d3590b SHA-256: 20e256724282cfbd5330669894654676ed7d24442129e11144816545fa7382fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure strongly suggest this document is part of a phishing campaign, likely using a lure related to 'disaster management' to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/2746065483.pdf In PDF document text
    • https://deitratech.com/userfiles/file/zonawapoxutorunobadi.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/xowaxuzuruteledezedazegi.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/funafekinefa.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/dirupebu.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/gomopekivuperozuzonevu.pdfIn PDF document text
    • http://daithanhnam.com/upload/files/zedigatej.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/bowafosiserojujoke.pdfIn PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/viwugefofugopak.pdfIn PDF document text
    • https://lingchuanfloor.com/app/webroot/userfiles/files/51210047607.pdfIn PDF document text
    • https://miltonmattox.com/userfiles/file/judazal.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/887eb0abc608c661bc5968c3ef88da6a/gineru.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/pewakadezawuzoj.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/pumevozisozazib.pdfIn PDF document text
    • https://heart-calligraphy.com/uploads/files/202109052324519240.pdfIn PDF document text
    • http://goref.ru/files/file/wakofuxitapad.pdfIn PDF document text
    • https://betamachinery.sa/other_files/File/kuzamajorekezobegoraku.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359581e2afa---titivijej.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/saxinuzuluruvepomidilex.pdfIn PDF document text
    • https://elperrocallejero.info/ckfinder/files/dutivofateriti.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/dixukevodotewe.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/8900156046.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/panudufimalefowumaxovejen.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138079c39ba2---rogiwokitaporirikilokam.pdfIn PDF document text
    • http://serting.eu/userfiles/files/bonim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=disaster+management+meaning+pdfPDF link annotation
    • 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_off0000c90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11F 15824 bytes
SHA-256: 57d25aa6bf620e5b7b2e79baabfdf38da62a84a1c4a8ef0bbfc3c6eb542cb814
font_02_sfnt_off00010958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10958 10676 bytes
SHA-256: e9f80e38b9f3e1e01979a42d9d90b2342380ba49ef5c77f5bec4b2fb6d6f1c16