Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef4c74b8a6d689d…

MALICIOUS

PDF

84.4 KB Created: 2021-06-11 04:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6abb8e5e056dc6c90f19ddd12c9fbb00 SHA-1: 1b57b21c7690369aaeb76ebb7f33e6507dba8494 SHA-256: 6ef4c74b8a6d689ddec8500951fe90dbc1b36120cd1925658ffad9354346a059
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious content, likely a phishing lure or a downloader disguised as a movie download link. No scripts were extracted, but the presence of numerous external links and the nature of the URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://catamma.ru/uplcv?utm_term=fifty+shades+of+grey+movie+download+1080p PDF link annotation
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/jnonn7oubke3um48dlvqk8hg16/49883781554.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/fojamamaxeduxat.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/uu80eojr90qmnmo823c2a3d647/70498227287.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/154b3e48e3aab47be914a52f58bae920/62673223928.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/c08563b40ad0ebe61f23dbb0569163e6/regolijomeferisepikani.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/67549408324.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b85d8cb1d---nogizi.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/sh2r1kkr0lc92ahsrhjikr1be3/toselisozawubaxi.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/lexosuramujakog.pdfIn PDF document text
    • https://actorconseil.com/files/file/5530095002.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/cef9a4ea0d0a6b1cd8108aa4c5017e11/sewolavedamepit.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/u8llgi2srf7flicdh0qmcu1585/tidadusegubeli.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/9becacb4f7cb8d756d375229a95acc47/vijovatonedawozepasosumaj.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/dimudifawomot.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0fe0437a0---digut.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/88ec28004d381ddf9d22eb64799836f0/85960430159.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080798c6ffe9---15765662929.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe72be9e62---xosujolupup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off0000fdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAF 6052 bytes
SHA-256: d13817ba0e6ba513141062e282c4b1a055a0ba2b4549866f4fae38629e3d466d
font_02_sfnt_off00011241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11241 1648 bytes
SHA-256: 4d2222f06a10e697bfc306adc6c93740fc3fb3de52aee3ce033d9d057445e764
font_03_sfnt_off00011a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8E 11512 bytes
SHA-256: f1ce8184b86f769365e1255c50eb1d9e9ac275c7aa79c8ed34edb0ccd5b9c0f0

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