Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1abd1dd1edeeede…

MALICIOUS

PDF

100.4 KB Created: 2021-09-03 18:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 40b19043a66739f555c013c701e96c7e SHA-1: 1082bb97183fae78900461f26eedc23c32b5a6fa SHA-256: f1abd1dd1edeeede03f5b4d6cfdcdba4d95d859cc72eb3e74e2454e213edaf50
196 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or SEO poisoning lure, as indicated by multiple heuristics flagging it as a link farm on compromised or disposable hosting. The embedded URLs, such as http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/vfavhdlo88cp9f0jse1nebkpp3/toxife.pdf, likely lead to malicious content or further phishing attempts. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://hogies.com/includes/template/uploads/file/35210128972.pdf In PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/7e613b3d000c9440b4154f5ee6d8fec6/jevitodatakegof.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/30793241299.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/99e31cfdccc373f211af3ec3d2dbf0b8/lixarokij.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/kutewijamaxojorixogejumuk.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9cefc39cb---99114115125.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/67294214681.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/7a828a13fc021cf003bdd25d05222a40/duvurolalevitili.pdfIn PDF document text
    • http://zimaletto.com/uploads/file/38891237456.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/xizidewedejepo.pdfIn PDF document text
    • https://edarky.net/data/file/pononojirezegitavoxu.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/14421068433.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ff9f91ec6---90538692588.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages//files/godalu.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/vfavhdlo88cp9f0jse1nebkpp3/toxife.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/1athfov46319ulg562ci4c9um2/jumogopun.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/7370989cb36f5b73efffdb049549f6a4/piwuk.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de47ae46821---tegug.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b829c1b81---zalizufofulapad.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/a3a62e348fec3d874fa55f87f47c4b27/36465612592.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/53493119025.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/rolovenotuwuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=synthetic+thickener+for+textile+printing+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_off0001227d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227D 18336 bytes
SHA-256: 7e315a680d4e3d4ac200d0ab5e7c97be463a40bb533867a1ea5dbc022b27534f
font_01_sfnt_off0001524b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1524B 10952 bytes
SHA-256: 72c1c045781c6c80d682d7aae8991058cef794b39cc064521cd82bf4a31732a4
font_02_sfnt_off00016b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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