Malicious PDF — malware analysis report

Static analysis result for SHA-256 12068f9af074550c…

MALICIOUS

PDF

82.5 KB Created: 2021-08-24 06:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7ef13a34f428dad221ceaff3c540b844 SHA-1: 84e1481d595dfd371387bba392cf2fafd4bf1ea5 SHA-256: 12068f9af074550c6125ed11c0d979b885a903df80df838497aaff9dbe784fc5
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites hosting other PDF files. This pattern suggests a link farm designed to obscure the ultimate destination and potentially distribute phishing content or further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://argentum.com/wp-content/plugins/super-forms/uploads/php/files/iibv8uc88953p78lnpqdb9bfhf/4463015981.pdf In PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/18460359527.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/ebnvisabt123fn7ovkjte7ju57/nukasar.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ots11vfqk9hl4l6kgjcu0saucc/29147523436.pdfIn PDF document text
    • http://scsytech.com/upload/files/zetazazakila.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/tasipasizipilapavowez.pdfIn PDF document text
    • https://fond.ru/userfiles/file/sarikemebipid.pdfIn PDF document text
    • http://nguyenquangcomputer.com/upload/ck/files/82410773671.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715d724b55a---63160269621.pdfIn PDF document text
    • http://beta-rc.com/upload/files/433809842.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160750dd8120cc---14893362068.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/u70o81e15unqc1tdu50ckvab33/kimipame.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b60c3ca3c---82818106870.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/kidudolupi.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/qqu73kcdid3ntedgcqgbg1tum0/malukakudexugijibokipewu.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/72118199e138ac657311a9ded8002ff2/5442020787.pdfIn PDF document text
    • https://shih-tzu.ro/files/file/85506751811.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/86359664528.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/m095pfack278674hu8fkl759l1/sawiditirefugujo.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1624805526.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/33506433739.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/75635308886.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e4e4bc671---60960312290.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4e6972575a---rutoketujazupoxafi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=integrated+change+controlPDF 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_off0000e06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF881 10340 bytes
SHA-256: f0afc92160f85c665074be326f8b95c6235a43d1d9ab3a3119182d21ad0a70be
font_02_sfnt_off00010f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8A 16868 bytes
SHA-256: d598399c49b2030440e842847f5093e4bb23a475a3c5bedbba08df4dceba3bd2