Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af5b0e0179e3729…

MALICIOUS

PDF

72.0 KB Created: 2021-09-17 16:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 42c81e727f2eba8d1f7d0eaf78bd7961 SHA-1: e88f958d7cd7b4f15a7fde3b03d8dff0b90438d4 SHA-256: 2af5b0e0179e3729a52c786da92241a2a25fd47607de61f92d8cad70fc421629
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites, and one URL specifically mentions 'reset macbook pro password recovery mode', suggesting a phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16131d50a54b91---sowisilewesinubowapoxu.pdf In PDF document text
    • http://nppgursaraijhansi.in/ckfinder/userfiles/files/fetukoxegafate.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/zuvewozedejubud.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/70589451345.pdfIn PDF document text
    • http://abpjse.news-read.com/upload/files/xugulizejupetoxadegixu.pdfIn PDF document text
    • http://dnt-mayak.ru/content/File/napamabexen.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/31875932369.pdfIn PDF document text
    • https://mkontroll.hu/File/mozuxuj.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16141a2a1ccb48---gezuf.pdfIn PDF document text
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1631595265_25fe45b082.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/56452885283.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/lekujuselefulo.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/wilejamofibulo.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/93117310285.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394bebc6c14---61246848756.pdfIn PDF document text
    • http://lysfyyy.com/upload/files/gugimewejug.pdfIn PDF document text
    • http://weforyou.it/userfiles/files/77793953419.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/20232867994.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/nuzopuzugejimo.pdfIn PDF document text
    • http://baltyk.recykling-rejs.pl/imgturysta/files/zifena.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///2441763739.pdfIn PDF document text
    • http://lblussana.it/images/file/93018561077.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/16667855315.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/fizaw.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/16001825482.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=reset+macbook+pro+password+recovery+modePDF 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_off0000b844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB844 15812 bytes
SHA-256: 74bc9aafa41d1b43875add6de60e8982bb0b6d3c573c5f891b8fbde207ce8fda
font_01_sfnt_off0000e0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 10976 bytes
SHA-256: 5b6368cbe4fc839a53b619500315fb6c5ba8a71a0902841dcc18148bf615aefa

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