Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00f140332442267…

MALICIOUS

PDF

78.2 KB Created: 2021-08-29 07:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4716385cf65fb7a4c99362fc544d0ea6 SHA-1: dabe7be59b88321e2b2ff9d0a52f17d9619d5861 SHA-256: d00f14033244226717da45d8f52e01900a939d21cc4d5d95cd06710a557a0ee9
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites hosted on potentially disposable domains. These links likely serve as a lure for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://strategie-online.net/catalogue_dynamique/file/maxagidesonol.pdf In PDF document text
    • http://alibabashipping.com/userfiles/file/pekijajekodisomumesenej.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161092e1c88f81---zagozewemibegezemeb.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607002259a3f2---33704159169.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/52906662454.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9b16dea7a---jefoxujudejij.pdfIn PDF document text
    • https://unicon-msk.ru/data/files/1448406467.pdfIn PDF document text
    • http://lblussana.it/images/file/mamogis.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/vidax.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/330f8fdcc5efab8d13fb705583a2ee3b/19723865198.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/21122694086.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b736af50761---nuviwawe.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/wakamogudopotufosiwagoji.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/walozobozasa.pdfIn PDF document text
    • http://armanetti.com/images/bevukebokuf.pdfIn PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/supadatomagimetisaxi.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e89407d0da---lifinajulurewafutofa.pdfIn PDF document text
    • http://kbinteriery.cz/userfiles/file/finuvadetuv.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bb5a0d147---febufatam.pdfIn PDF document text
    • http://h-st.nl/bestanden/files/48897630804.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c74dd7ac0---83967203032.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=osx+combine+images+into+pdfPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/35170559111.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_off0000ca65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA65 11084 bytes
SHA-256: e239edc841ce67343ff2c4640c03fa7db88c109aa18b242bb85857f7d32437b6
font_01_sfnt_off0000e3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEE 18636 bytes
SHA-256: f78702af8a8dd4665829e234cf5f3a3a18858b3750e66357734b78fa66225e27

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