Malicious PDF — malware analysis report

Static analysis result for SHA-256 e290184f19123278…

MALICIOUS

PDF

71.7 KB Created: 2021-09-13 17:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 439fa8e34831e5f349438b582db410fa SHA-1: bbb56a91247349e726151d5b90dcbd4f38e228c9 SHA-256: e290184f19123278b3597438854174b23bf05ea29d7cdeffffb27fb7c129d39e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous embedded URLs pointing to other PDF files, many hosted on domains associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious document designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 https://pisangmanis.com/contents/files/xotafofeperapoduk.pdf In PDF document text
    • http://daeryuhealthcare.com/ckupload/files/47778964986.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/duzivuvi.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/11114809771.pdfIn PDF document text
    • http://zagazzo.com/userfiles/file/3702519239.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/94144825457.pdfIn PDF document text
    • http://hzosm.com/images/upload/File/paviniwatokeralada.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/xugezonujuwapuvofeg.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/951uobjheirh24e3ujb386tgi0/ralajiwon.pdfIn PDF document text
    • https://mitrasuksesku.com/userfiles/file/73684107894.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/90632015202.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/86107408736.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79554895642.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613153ec6d771---62528689770.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/48463579294.pdfIn PDF document text
    • http://huanghels.com/filespath/files/20210911185054.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/raputumakenixugimi.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/rebokilepimakuv.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16136ab3ef0ca5---tuzunov.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/47954842254.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/keborodotovirukef.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/69772624880.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/pofazeritugajugopubilex.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/3507379070.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/lojegibe.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/murexijojudexepafukovova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=royal+followers+apk+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_off0000b8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A1 10640 bytes
SHA-256: 56d798b1243aa0caff63852b0fa2386791d7bb1efcd616179f5ec39aa6129d90
font_01_sfnt_off0000d134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD134 15608 bytes
SHA-256: 96442a340ebf050e7bfe459e6f4b158ed4ac44338104ead4d124aa70400513ff
font_02_sfnt_off0000f8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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