Malicious PDF — malware analysis report

Static analysis result for SHA-256 00ff1b48f0cf084f…

MALICIOUS

PDF

74.4 KB Created: 2021-09-09 07:35:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 31bf33485a199d38bdf2f674baa3cbd9 SHA-1: bc7e5bae5be6c66bad738474c07189d723f1f474 SHA-256: 00ff1b48f0cf084f2e7b3e9cbd90c8831f26f51e7c9314889eee98c19ed9cfc3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable domains, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent. The file's structure and numerous external links align with techniques used to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://mangallagn.com/images/file/8830355611.pdf In PDF document text
    • http://guides2alpes.fr/uploads/file/verosazatutapevira.pdfIn PDF document text
    • http://jezirka-biobazeny.cz/UserFiles/File/72588223545.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c1f89ff41---15758469162.pdfIn PDF document text
    • http://www.tsahimmongol.com/uploads/images/files/61437818445.pdfIn PDF document text
    • http://erictex.com/ufiles/files/nugil.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1613115cc0db09---palufe.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/jovuwadikogifew.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/10739028547.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613416d14dbc1---92814158884.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/tezinebumofosakadefilazot.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/rovadaz.pdfIn PDF document text
    • http://sushibelovo.ru/files/duwunupaboxozaxokur.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/81811739792.pdfIn PDF document text
    • https://98ing.com/upload/ck/files/20210908_044605.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/ramozatakibabefi.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/27258321413.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///73263371779.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/6248659325.pdfIn PDF document text
    • http://medi-sen.com/files/files/pufupisotujojuximuxuxole.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/82820852794.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161387a7892515---vobozefuvi.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/risorelopubez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=weathering+magazine+pdf+downloadPDF 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_off0000bb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB99 18300 bytes
SHA-256: 53ea0e5e1383f0fc4cf5716c84b046deac1f163d194fbff600e032faa8bc9f3a
font_01_sfnt_off0000eac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC3 10916 bytes
SHA-256: 432c4b634ababe565b57b99d698ccdfd50febb16f78b99ed4c7a838329b560c6
font_02_sfnt_off000103b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1