Malicious PDF — malware analysis report

Static analysis result for SHA-256 3200cb77ae49067c…

MALICIOUS

PDF

80.6 KB Created: 2021-09-19 06:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5a213298ef116eb43e6fa3133d8eccae SHA-1: 738c7e887adaa7b1a6bd953463127c125a25ec8b SHA-256: 3200cb77ae49067c7bbb292de55dc73e73a2e6d19fc20708771012e0eb36f200
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that direct users to various websites. Some of these URLs point to compromised CMS upload storage, suggesting an attempt to lure users to malicious or compromised content. The presence of multiple external URIs and link farm characteristics strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://literie-depot.fr/UserFiles/file/44929333682.pdf In PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/94552885300.pdfIn PDF document text
    • http://iviltra.lt/images/files/tovisefuxuduvisazegew.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/jazepopujidam.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/aadd280a7420ea2e1259a67bb8faf5b0/67897614429.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/9ed442bafc2a96d8e8374d9580c9c077/sobirurawerimiwata.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/2410507113.pdfIn PDF document text
    • https://innovaciones-plasticas.com/imagenes_cont/sitio/documentos/84903360468.pdfIn PDF document text
    • http://claudiamelchior.it/images/file/tixabuzama.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/jufomo.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/dosixojeketowubefaxekipez.pdfIn PDF document text
    • http://dotacjedlaoze.pl/userfiles/file/98007312287.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/32220114290.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613cfd4d7f3c8---papelijabe.pdfIn PDF document text
    • http://vinaktv.com/storage/ckfinder/files/51963927720.pdfIn PDF document text
    • http://st-communications.com/ckfinder/userfiles/files/zugifowexisofevegevuxo.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/zezibepukoboruwube.pdfIn PDF document text
    • https://webrekruit.com/php_codes/Scott/VieauAssociates/code/userfiles/file/zedisexosibulavowore.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/wabizexunukuzonijoxub.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/72641101801.pdfIn PDF document text
    • http://fgosvo.ru/files/files/zafulimejarirabak.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210906044217.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/nebenuvozo.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/tozuperiwudoj.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/wemepilamunonipixukovu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=nascondere+foto+galleria+androidPDF 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_off0000d790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD790 17132 bytes
SHA-256: 74ace33b38cbc1c2cb97b2c85ac8ba94efa31a9372cbbd06447dc71a2a0e4274
font_01_sfnt_off0001040e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040E 10628 bytes
SHA-256: afa6413d106b56ee16c009164a12a21147c13501b88b48ecd3530884181ed812
font_02_sfnt_off00011c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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