Malicious PDF — malware analysis report

Static analysis result for SHA-256 35142018e3d08a7f…

MALICIOUS

PDF

90.2 KB Created: 2021-07-28 05:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f5b3d4eb7d6493a305ff34dc5a3fb349 SHA-1: dc164d2c7ccffecf19f6203dfec802bd8200109c SHA-256: 35142018e3d08a7f96945e5ffe8004c373a97381d5201b539983005bd3d0abf8
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 upload directories and disposable hosting, suggesting a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the structure and URL analysis indicate a malicious link farm designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://atolab.it/wp-content/plugins/super-forms/uploads/php/files/25c25c7d61ecdf8efd7e1f171977dc30/xasafoferofi.pdf In PDF document text
    • http://iwishop.hu/file/redekawuramivetiko.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609b21fc567cb---40481662433.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f0910e39d---gunuwatimojog.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081a7787d76d---nazuxarepanuwudirumot.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/85226648238.pdfIn PDF document text
    • http://fygl.net/uploads/file/13163616959.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/66089346397.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a175d9e57---61323622101.pdfIn PDF document text
    • http://diamondsnspurs.com/clients/12200/File/wikugeninelamelitorot.pdfIn PDF document text
    • http://valeneighbors.com/userimages/romogekijarepuvixenetamek.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210703210941_1179474914.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160b2075f400bc---65346076213.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed29e8c4c15---1894302015.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/70721041828.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/50851416468.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/lufijevugiveluwudo.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/25645239580.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/upccef2ha800gle0911ea1r7i0/satewatib.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/mamalur.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/89091536770.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/nesokokawutapodesezu.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/155303331760f08dda663f1.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b3d6b3a10---72105514461.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/xidokajaweb.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210719022428_ohx6xj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=falacias+informales+tipos+y+ejemplosPDF 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_off0000fbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC3 17100 bytes
SHA-256: f0790ce7180d2d59d6d85f8ee28cbd64ffe6d157a3066371e4d14f2649349d0f
font_01_sfnt_off000126e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EFB 10864 bytes
SHA-256: b999fc4975d600ed1fe7d797e913549801dd236a3eddb246dc95f1cef531c07f

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