Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7cecf7fd13d3b0…

MALICIOUS

PDF

74.5 KB Created: 2021-09-17 06:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5b0f99aa935027f1cb8fddf3ec233ce5 SHA-1: 202f1382e5d72fdfcf7808aa88f7992afccc31c7 SHA-256: ed7cecf7fd13d3b04500cb08328fa0080a7bb3b5b08ada87c9c4703109cef086
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate the document contains a link farm pointing to compromised CMS uploads and disposable hosting, likely intended to trick users into downloading malware. The presence of multiple external URIs and the nature of the link farm suggest a phishing or malware distribution attempt.

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://drafthe.ru/uplcv?utm_term=beauty+plus+camera+app+download+apk PDF link annotation
    • https://rtquery.reitoken.org/Coaching123/images/files/75382008532.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/lofewojexibotixiteput.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/texumomevaxu.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/zadajol.pdfIn PDF document text
    • https://jeevadhara.org/work/london/userfiles/file/zogujetitujopegewexituw.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/pajidiwaval.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/pizabuborojunodubobo.pdfIn PDF document text
    • http://yoga-privates.com/yoga-privates/file/46140456108.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614166ed84ae7---69619340024.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/luxofapavuge.pdfIn PDF document text
    • https://ou-ravda.com/ckfinder/userfiles/files/93433007263.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/sanugemegoke.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/268c112a21a04fc018934d37cfa8c9b8/zuperopenirema.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/nejimoweriwediwume.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/jfsmgsbd88noe0a953pvmusmef/koxuzot.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/bubode.pdfIn PDF document text
    • http://laskod.hu/userfiles/file/ganajewisaremojosejomoza.pdfIn PDF document text
    • http://zimmerei-possert.at/tokuwizasigusi.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/xulegod.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/tefugoburirabisemuse.pdfIn PDF document text
    • https://uudanbury.life/files/file/sevasinuxomovejepexate.pdfIn PDF document text
    • https://derfo.info/resimler/files/miduvemimugavova.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/95243007768.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/28142269454.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_off0000bf11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF11 16604 bytes
SHA-256: 2dafb3ae3927ce2a163b91290e783fefea9dfc6bc9b317c75bcde9fc315e03f2
font_01_sfnt_off0000ea24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001023b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023B 11028 bytes
SHA-256: bbe2f3713ff2a4a214cc3d8acc203b2770db307ff480eda0b6aee36fc18a04eb