Malicious PDF — malware analysis report

Heuristics 8

• ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
• PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
  PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
• Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
  PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
• 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://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/sd8ja7ap43rfr6skhsjbdrg7uv/rufiluwakapokulixazalidu.pdf In PDF document text

  • http://szpk.hu/_user/file/toxepubewofozememo.pdfIn PDF document text
  • http://buffagiuseppeinfissi.com/userfiles/files/zekijolawefaxanij.pdfIn PDF document text
  • http://daehwa.info/uploaded/file/rozulagusagenomet.pdfIn PDF document text
  • http://beta-rc.com/upload/files/retibilolu.pdfIn PDF document text
  • https://okazionche.com/files/nomerajetowojal.pdfIn PDF document text
  • https://ratoempat.com/contents/files/ziwerejorukemomexu.pdfIn PDF document text
  • https://selispin.net/calisma2/files/uploads/41540376370.pdfIn PDF document text
  • https://cfaegaianascente.pt/portal/userfiles/files/82669348094.pdfIn PDF document text
  • http://hengtongrongshang.com/jingkelun/userfiles/files/20210914112733.pdfIn PDF document text
  • http://xn--80aesyq.xn--p1acf/files/file/lokifijusabod.pdfIn PDF document text
  • http://karaokejdi.com/ckfinder/core/connector/php/upload/files/70191323079.pdfIn PDF document text
  • https://purefeeling8.com/data/file/winex.pdfIn PDF document text
  • http://francescofesta.it/userfiles/files/79555685671.pdfIn PDF document text
  • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16131f77e10c41---vuxumobumirasimenivi.pdfIn PDF document text
  • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e4ca2204a1---38966771007.pdfIn PDF document text
  • http://gemaeldeundobjekte.de/uploads/files/24034242232.pdfIn PDF document text
  • https://kitapkaplama.com/upload/ckfinder/files/64390697994.pdfIn PDF document text
  • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/78938909573.pdfIn PDF document text
  • https://dichocungtoi.com/userfiles/file/91917482761.pdfIn PDF document text
  • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/31250321309.pdfIn PDF document text
  • http://hoangnamjsc.com/upload/files/28141160561.pdfIn PDF document text
  • http://kamnitikamini.si/upload/files/82194809115.pdfIn PDF document text
  • http://volkshilfe-vlbg.at/images/content/files/68172427271.pdfIn PDF document text
  • https://mb-classic-service.de/userfiles/file/42502998038.pdfIn PDF document text
  • http://hk-sai.com/ckfinder/userfiles/files/rapizobuxabuwimitelipor.pdfIn PDF document text
  • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=new+android+tablets+2017PDF 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

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