Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e7ba783555b1eb…

MALICIOUS

PDF

87.8 KB Created: 2021-09-03 08:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3fc08885b85e79cb9a30fc00383c438d SHA-1: d6da947d88e3a3e0b749829bb446d4be7ec5d601 SHA-256: e0e7ba783555b1eba8fef1faa4b7f311ff95f928907a15c784b1f438586bf05f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous external URLs embedded within the document, many pointing to compromised CMS upload directories or disposable hosting, suggest a phishing or malware distribution campaign. The file's structure and embedded links indicate it is likely used as a lure to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crewmak.ru/uplcv?utm_term=deep+learning+pdf+github PDF link annotation
    • https://tidymoney.com/ckfinder/userfiles/files/62306852068.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/sovatidapulazezab.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086f9117d14b---bugowufizeg.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/2p8auf8a5shpuhhtb1cvr10l4j/sogekunetofuwa.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/girisaxuvadaranuraxomi.pdfIn PDF document text
    • http://hzqzg.com/d/files/wajolixora.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/35766671713.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/b1761ac465a61a20b5cd37952724d5c6/rejujizulujefovak.pdfIn PDF document text
    • http://intestinalfortitude.org/clients/0/0c/0cf504f131cb0201443a7bd449519f4a/File/18039093365.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/28307573765.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b066ca152e6---semeputox.pdfIn PDF document text
    • http://dainichiji.com/upload_ckr/files/lepamegojofesinizifam.pdfIn PDF document text
    • http://erex.hu/upload/file/nojabidevebole.pdfIn PDF document text
    • http://ipublicity.cz/data/file/77750905698.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb75a21790---tatotinigege.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6efa5acb3e---54144612792.pdfIn PDF document text
    • https://gotamsui.com/ck_imgs/files/67468179698.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608511c3135ad---dodadilimolanapowewez.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/3glr0i7j5iplu7hvkfh41qr2r4/jinobegisokofanevunimafef.pdfIn PDF document text
    • http://spzpoz-zdunskawola.pl/upload/file/gegoxane.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609acfc6bc505---12295755782.pdfIn PDF document text
    • https://aashianarealty.com/file/viwubowavalovutusagogidij.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/89918767652.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/guzikiguw.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075807166f87---vugovatotulu.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_off0000f247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF247 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A59 17872 bytes
SHA-256: 0419379ee4603938a1758c7bd05bb9070c09c5e8a3618f8ac797cdaaa5da7071
font_02_sfnt_off00013985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13985 10728 bytes
SHA-256: ec69f698d1127f9808f12b886356360ecb9c7f76b805324c25273feb3c723f2f

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