Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f6a32b334fa112…

MALICIOUS

PDF

83.9 KB Created: 2021-08-22 01:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a6243a2ac4a3cdcf5979cea9631d3cbb SHA-1: 01a9225a043e3eedc5fe4bca1c3fe50b20c19b3c SHA-256: 84f6a32b334fa112a9465b37aa5bc4c67ea526b2112350f9da74ce7786a93a3f
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites and a deceptive download button, suggesting it is part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 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.
  • 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 https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/ibtaeflferqqtbheijeomt6tjb/miwoxigomurezu.pdf In PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-7-14/20210714123239503631.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3cd4f14c0---28748994633.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/0cff3286e4823b31a4a14b0e1f0c6fd5/notutezuwoz.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/narogikamoworadarupogodam.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/47621144068.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/10a01e14809494af2ecbe96206da8997/rebefezagixafovesotejili.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55df615466---66491460802.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9d923c1c2---28601488781.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/83233797646.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf535b75b7e---5178648423.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/6922427f827855f8b17a03cf5c93f072/62331394199.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b76e6de12da---niduvategubof.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/japolokemakida.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/tusilolixodasu.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/e283e5d557710fcddee7c751fe1b83a9/43443746103.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/zakavop.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/21544388313.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bfac1819e9---16659039003.pdfIn PDF document text
    • http://nabisori.com/userfiles/file/fowitedesikalana.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/48425839935.pdfIn PDF document text
    • http://wedding-box100.com/uploads/files/202108181825196748.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/zixukej.pdfIn PDF document text
    • https://somogyplusz.hu/files/97691592253.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/vobisegigetaraxifijofe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=rapidex+english+speaking+book+kannada+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_off0000e441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE441 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC53 16868 bytes
SHA-256: f9109007a7590426d1ffac16dd928c2d9d1bccd6b6952f38c8e7759c37b90e8e
font_02_sfnt_off00012820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12820 10960 bytes
SHA-256: 6909f805a8f3e9d6829ad644c75452852c372ebf6ccc20626db2cddf04541140