Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcfe208cbd460517…

MALICIOUS

PDF

74.8 KB Created: 2021-06-29 22:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 57a8bcead8f5bef301669d18ba22a7d6 SHA-1: b7ec77aac72bc7f8a0bdc67881520c47de828ed8 SHA-256: bcfe208cbd4605171e819c06f40f258867557aea10d69d2e17e0e77a839f4912
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of multiple heuristics related to link farms and compromised CMS uploads suggests the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0338ef1026---36918742673.pdf In PDF document text
    • http://sp3siemianowice.pl/userFiles/files/70306355250.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/a0outu23v17eg2d89tralvud7e/jenafolajiwerofefi.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/novanekipusajazobu.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085cac52efb8---zovapimozabivedimopoli.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/f7efb3be4d32f147bf2f3160325bd873/nufobavumelobop.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/ebec92c89acce54750fda151ca7e753c/razodif.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba47bba181c---15421618701.pdfIn PDF document text
    • http://airsoft1.ro/files/file/pufafu.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/13901905589.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a9da2cc227d---movategixebekubupezidokas.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/vipadogasunur.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094a3de3f958---fubomemupogenar.pdfIn PDF document text
    • https://shipnhanh247.vn/asset/files/77214640533.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69c74ce584---27461172613.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/66828768949.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748f6465409---zodabo.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861fb713f68---84973196452.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/verarerujixun.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/jiwis.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b52d23b0278---tikugogisuragowelabo.pdfIn PDF document text
    • http://leakefamilyreunion.com/clients/63964/File/24740378922.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/541f4d0b7e3c01f2e86f156e4b5dc46a/mirawebimesekebiwova.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/713ec84dbfea098139ec66f21269db66/zikodoripe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=dungeons+master%27s+guide+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC066 16620 bytes
SHA-256: 87298a8e523833452c3e4522f40dbc4c07d10fe17dbff0a1166268af2f43abc4
font_01_sfnt_off0000eb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB47 10932 bytes
SHA-256: c2992589aa856e50a5c4fdca7dd84af71f8344c023b6b6c2ba83873a3b9cc0cd
font_02_sfnt_off00010471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10471 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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