Malicious PDF — malware analysis report

Static analysis result for SHA-256 7044f8c7d6f1bd91…

MALICIOUS

PDF

75.9 KB Created: 2021-09-01 19:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 04c2fd109fc3a5029e9e1addab14691b SHA-1: b9c93e75f97bbb5e4148508f37f50b1ec9713678 SHA-256: 7044f8c7d6f1bd9163c955146197b6d8561d48922b7f00a4ec8d9e4b9a128f69
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm or phishing lure. The primary purpose appears to be directing users to external malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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=urban+reign+for+ppsspp PDF link annotation
    • http://2ds-creations.fr/userfiles/file/mamem.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072cf7acdc30---64009084107.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/6gq6vvod95hs1t1435khu22ank/muwuf.pdfIn PDF document text
    • http://dzwigipoznan.pl/userfiles/file/balanudemenulobifamur.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/v3bjkfa0op2q01fkl3hlvrpjk4/tuzevuma.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084f3d0e9ff9---goxinulizun.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/mejerubifozogi.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc0f188dc6---98682570615.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/wodajusiban.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/sominuli.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/desebep.pdfIn PDF document text
    • http://shiokuda1.com/contents//files/napulegaluginatirosam.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/a93348a163d036d42ca26658e63795d3/56434118063.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/48579602252.pdfIn PDF document text
    • https://olterus.org/contents//files/67928134015.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb05700d853---bivotilatebonujupepofen.pdfIn PDF document text
    • http://df-2.de/images/daten/file/5357305201.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/tevvnmfssj2auf58veik8omv80/tenonuwepinagajepuw.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/tejasupipafoferisovanuwet.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/54648855752.pdfIn PDF document text
    • http://gorillatheory.com/admin/upload/file/wopejevegifiwubiwomod.pdfIn PDF document text
    • https://mimpi1pusat.com/contents//files/kusotoko.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/52789576247.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/c9712fdd698201a1b507e017bba3cd0b/27507137795.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753943cb181---tomudi.pdfIn PDF document text
    • https://ikima.fr/uploads/file/72586837486.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/3be10aa71d0f66ff08e4f6d6e667b64e/lirosesa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC372 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB89 10536 bytes
SHA-256: 5d6aca4e05f062b03adeb35c5bc2413810b003ee670e3e5aabd65228cf1b64eb
font_02_sfnt_off0000f367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF367 17472 bytes
SHA-256: bc08351e2fe8ab484934d2da0a4153a1fb11e76a2d8c90dd4fd534e6f3880069

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