Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaba9350028dc79e…

MALICIOUS

PDF

85.2 KB Created: 2021-09-03 11:32:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e769f6900e1a81e54c5862d25d4524b1 SHA-1: cbdbd6b5396c555a9d9601b9add7e571cf2f61cd SHA-256: eaba9350028dc79e25ac39d957c1ece4b58bba1716e9f76369a04bbb2ad6e0ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to PDFs hosted on compromised WordPress sites, suggesting a link farm designed to distribute malware. The presence of 'utm_term=embedded c interview questions pdf' in one URL indicates a lure to trick users into downloading the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aad533cbd0b---mimis.pdf In PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8fc6b008d---judumifupikadojudizom.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/3e9fb1500d4b3dec19d7144544292d18/85399873002.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/96673279223.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb23c4170f---3357080241.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/fapowedibabufamowaj.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/69045443306.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/45613472713.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/72f46b113462a370f4ec1b8098bbaf1f/15545355103.pdfIn PDF document text
    • http://westernstudioservice.com/admin/userfiles/file/murumemopovariso.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210619185641.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/sekurikikatawenap.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb2b3e6bf51---laguruxokixopotega.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/xamozenewakeguv.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160a283b829993---mozejadikoxema.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210812053044.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/4ecefb294907ffa412a53ac8e8800023/14431497377.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/watug.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608935ae7a317---nijobojamedi.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/gutubopigabatoxijemor.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/11928530604.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161117b3bd077e---gunoperid.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2815723e5b---42883725896.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=embedded+c+interview+questions+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_off0000e5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F0 11096 bytes
SHA-256: a0caabf380af32d4a0fdfb81e64031eca89253a6529b5cafd91c0f85dbb07639
font_01_sfnt_off0000ff63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11775 18256 bytes
SHA-256: ba3ffb3d47ab09ba028d06d154080d88e0717b2796fca378c5fcfae8b42c6a93

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