Malicious PDF — malware analysis report

Static analysis result for SHA-256 e706016fe3bc8e17…

MALICIOUS

PDF

78.4 KB Created: 2021-09-06 20:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 608ff697f9956fefe1f8c5ba5644b321 SHA-1: 97cb7e2ff0ab18cd32b197d7800779a700335c4c SHA-256: e706016fe3bc8e17a607f4fea955ef54724a336b71ead3aafbccdf5e12c7a168
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF viewers or redirecting users. Multiple heuristics indicate the PDF links to compromised WordPress sites and uses disposable hosting, suggesting a phishing or malware distribution scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://autoandtruckrepair.net/nbloom/fckuploads/file/87021375922.pdf In PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ca2e10a76---lagebenobudifexo.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/20q9agjfdbf6ah15govndboj7f/simedudolanigeg.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/0aea881623349cc4c390a4922768bbbc/debatebak.pdfIn PDF document text
    • http://zonwering-nederland.nl/ckfinder/userfiles/files/peximaxitizugep.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07200bbd8b---19517702791.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/85e6aa196f8d3a825f59d1aee1d84f9f/vadesevarifusajonewam.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/zaneb.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///pafev.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/jujosa.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/48fee8d9de909f404691c205936a95ad/16176509965.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e777a8e9c56---90561773422.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/99840080476.pdfIn PDF document text
    • https://abriganature.centralcms.cloud/galeria/files/65548437037.pdfIn PDF document text
    • http://ktcyy.com/ckfinder/userfiles/files/gosekivuzixasa.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4e14ed5ac---nobixogek.pdfIn PDF document text
    • http://ndt-ultratech.com/files/26617730183.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c10a88bffc---35443837524.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/84607930032.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/98fab7d04d78327ae0ee37d830fd1a55/fodutaroj.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/losegogosote.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/irnj7s77ck1q9tnbtrml5jq9th/43541501830.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076167a0a7e0---vagiretavebu.pdfIn PDF document text
    • http://qwerty.pl/_data/file/rozox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=asturias+albeniz+guitarra+pdfPDF link annotation
    • http://www.cst.rnu.tn/js/ckfinder/userfiles/files/ximuvixewuf.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB768 10836 bytes
SHA-256: c7ec55df54bdf583b501daf7215b4b33e4c9f55f9e1333fb4761e7f3a4596c53
font_01_sfnt_off0000d020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD020 18108 bytes
SHA-256: 0ae58f35dad927ee5c8e7f73537acb544401ccafe188ca76655a09e418677504
font_02_sfnt_off0000ec7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00010490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10490 15396 bytes
SHA-256: 33982e0766563392f6683cbf16af8bcc6921119137a25290cef2f46bfacc94ea

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