Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e954addf742d771…

MALICIOUS

PDF

89.0 KB Created: 2021-08-09 11:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e08c95422fb732dfec3bc019201e30c0 SHA-1: 257066b788d53c770543b1a823ce279de5283458 SHA-256: 2e954addf742d7710e5a4da290402b9be95101ce7f20adb5787ea4a4f9f7e822
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with numerous URLs pointing to compromised WordPress uploads and disposable hosting. These links are likely used to distribute further malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8fb7072c7---1187510160.pdf
    • http://katour.ru/admin/ckfinder/userfiles/files/678699882.pdf
    • https://banghenails.com/upload/file/gimos.pdf
    • http://abwalabamaave.com/uploads/files/kizupuvuxukawikomin.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acaf1c5d6e0---54479184418.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/emns7j4337a9v1jfqc78ug537m/92976710247.pdf
    • http://fullx.net/files/mukosumijisusurilazoned.pdf
    • http://dilimkebab.com/userfiles/file/45565898833.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c754fb362e0---60344117775.pdf
    • http://zulassungsservice4you.de/bilder/file/42446736465.pdf
    • http://ranjitabiswas.com/userfiles/files/58195769783.pdf
    • http://bmcnx.com/userfiles/file/41015737931.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee1e9858fe---14422188480.pdf
    • http://katyababash.com/images/uploads/file/welewakujisuroreveripedat.pdf
    • http://brava-ekb.ru/userfiles/file/18481791836.pdf
    • http://nakajima-ya.com/upload/save_image/files/nedorigekuvajujofulo.pdf
    • http://abwalabamaave.com/uploads/files/28863751698.pdf
    • http://st-johnson.com/Uploadfiles/files/xufusawozonefatipawimev.pdf
    • https://archielectronics.com/userfiles/files/78329405595.pdf
    • http://netmode.net/app/webroot/uploads/files/zadiwulajikus.pdf
    • http://cambresisemploi.fr/ckfinder/userfiles/files/fuvepedefub.pdf
    • http://hhsbluebirds1967.com/clients/b/b5/b592d679e9980e62d9d56be1bfb8b6b6/File/wilegosovaz.pdf
    • http://krevue.cz/UserFiles/File/70036025669.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce06153d61c---pajozuwopikamono.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608184eeb08f0---rasukuwalaxamelatupolez.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+put+a+player+spawn+in+piggy+build+mode
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f49d.bin
9a0a9538ebcc1df76b3e59a9a927c72c098d2e48f67855715c575204ae565e60
pdf-font-stream PDF embedded font (sfnt) at offset 0xF49D 11168 bytes
font_01_sfnt_off00010e57.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E57 16792 bytes
font_02_sfnt_off00012669.bin
11bc118c70f2a79c62a113a23a894e685e31a370b5c2cf3ac0f5dbd61fc0a0d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12669 17324 bytes