Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f5f5259a2e6c28a…

MALICIOUS

PDF

90.3 KB Created: 2021-08-09 04:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ad4735bf7e2e0244e0279eec0fae0751 SHA-1: e1329edd1680ada2772fdc62a0a0658c1d2f81ab SHA-256: 5f5f5259a2e6c28aae3ac2d089d0be705d8f8d2280d214bce7b169bebc4e62fe
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised CMS uploads or disposable domains. This behavior is indicative of a link farm designed to distribute malicious content or facilitate phishing attacks. The ClamAV detection and ML classifier further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://d4sontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/nedavimulinafagi.pdf In PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/4uf88i41eao5l7svvmu216lh6l/besamurezi.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/kutugemogukudasazut.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/5571117218904e074ef190440efd6f72/mulodula.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/foxevam.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/3089c95af021c66591d7b1c1226973eb/86402081639.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/sefalizadeje.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da4cb582a6---wilogefuki.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/b8fb0130ab521903eb60921909206571/21366377880.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/bidalepupisadoroxu.pdfIn PDF document text
    • http://waetsukai.jp/system/ckfinder/userfiles/files/11602215984.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2964c4c8cb---fogapofow.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/92324934654.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/83d22c74de49ccd2ecace1b3e58794e8/92374140520.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/71453189875.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/29sgk403ufajtot0vrncgr70h3/52552727097.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609663310ea5a---xikesoresagovedasubobumow.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/af42538414980c23769dceb3d8f8cda9/vigipufudumel.pdfIn PDF document text
    • http://tplustech.com/images/ckeditor/files/12699019262.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160856f0c9d4cb---zujuburulotabemomotu.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16081ba1e37ad2---naferujajujiki.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/jalilufigafibexadufenepuw.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/zodamudigupaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+program+bose+700+soundbar+remotePDF 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_off0000fd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001152f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152F 17244 bytes
SHA-256: a8896e568107631078789e25b767960a26857ed083ec9d7a55bc0d3ff1efe31e
font_02_sfnt_off000141c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C6 11084 bytes
SHA-256: 3a2e82bb2426edce2a0af8102bf201507b374fe76131305ee0791fd1c70cc2f7

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