Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd475b226826b33…

MALICIOUS

PDF

89.4 KB Created: 2021-07-08 04:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34205cf430cb63c5687fabb12c66fd8c SHA-1: 0efdb11dfb7928405082ec1666b073ea97e2d806 SHA-256: 1dd475b226826b337b926eb6d169433763291c80dc7661a3c8796ca0846c77b9
224 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, impersonating cloud document sharing services to trick users. It contains numerous links to potentially compromised websites, suggesting an attempt to redirect users to malicious content. The presence of a 'Password-protected archive' lure indicates that the document is likely a precursor to delivering a secondary payload, which is further supported by ClamAV's detection of 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/584699e6a4049e8351c7dc15d22eba63/76132413308.pdf
    • http://bonfiremadigan.com/uploads/fckeditor/file/38472527772.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a1449989c8c---33263111961.pdf
    • https://vietucmould.com/img-vietuc/files/32394725945.pdf
    • http://agcslohian.com/userfiles/file/tosojon.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/luvpffq3gu4tt5lie9klmn9ic5/13095965241.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160951ba3876e1---93692163567.pdf
    • https://etonbio.com/newsLetters/images/file/45980984758.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160778e655968f---govukenekexosewerobefidip.pdf
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608557c048683---95556331608.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/d2f12be9c23e9571c3042a5a1f50edc3/62060210008.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/411fccc68ac1386a9363821b11910fa1/xufakikagodipolekekago.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078757c49d60---61467999704.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/4lph0dc7o1h5e2u3h8bkla0n87/70304785391.pdf
    • https://elesud.it/img_pagine/file/45670136057.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd6fc6952f---didizaxuwud.pdf
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/jetabenub.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9f05d8144---mebolurokanatixoxer.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160725a7361215---woxabezax.pdf
    • http://aisef.org/uploads/userfiles/file/file/60750307298.pdf
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608511f703390---9560492060.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/pm0ai7e0uuth5k7bdhm4gjf0gj/97540335003.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c09541e4005---wanepuzogopamibuvavanisi.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3d3d861c71c55d6fc73ab87e760d174f/41520191299.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5l1k5phk5j02qgds8qdmscaje2/tadivawabap.pdf
    • https://ludifrance.fr/userfiles/file/nawutuzaxixobaxinusumes.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=c+share+variable+between+files
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f719.bin
8c0a1b780e3d4c1040b8c226e662ad21c6bde17869e338a955b8e600129077db
pdf-font-stream PDF embedded font (sfnt) at offset 0xF719 19764 bytes
font_01_sfnt_off000128c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x128C5 16792 bytes
font_02_sfnt_off000140dc.bin
b78c9ce21489c86197a10440d52460bca937358f9ea8958130654b9f3dd00602
pdf-font-stream PDF embedded font (sfnt) at offset 0x140DC 10516 bytes