Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6872a5bc784de5…

MALICIOUS

PDF

156.6 KB Created: 2021-07-13 12:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b1c0558136b47e0b61b19ebcd840bd12 SHA-1: f1fbbdff96c04124af7d12736c05294dfa2158cf SHA-256: 3c6872a5bc784de5eb26308fe239236465e46513a572d8b385998b00d748d33e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ClamAV detecting it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised CMS upload directories and disposable hosting, suggesting a phishing or malware distribution scheme. The file's structure and URL patterns are consistent with known PDF-based lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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.
  • 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://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e82914d920c7e7c466a765bb02008bbe/98476506601.pdf In PDF document text
    • http://jnafarms.com/clients/864068/File/7572997579.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160940575d87d6---99486404665.pdfIn PDF document text
    • http://rolfingnaples.com/clients/a/a5/a5422f62036d2d393d866963e902351c/File/wofag.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/5c327924f5337a54b6b68836e7e730db/wevejibebupulesapukufad.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/sezusojadufakuw.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/wixazuworexox.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d17d4cdd5---3033480406.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/22526622202.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16c6dd7031---72343358244.pdfIn PDF document text
    • http://passaicvalleyclassof1957.com/clients/44362/File/35000372243.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d4581d5911ebbe3b748b83124fbad810/77431760274.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/potesesoxefe.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/8rq4jvblgtaslq4b43rvvdm1r1/55833088921.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/juvisugamif.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cde78c0791---32778746392.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/rifevepar.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609180f2d9eef---58613375638.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/vb38kl0mgfdn52lmmg3cp2jsg5/74427656106.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/b33502070498824d4875f9ec8187944f/gidebinigajarijof.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a72bd4e4b---10649877904.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/navosidajifamajavatubis.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/wunigapa.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4573d9533---15819189180.pdfIn PDF document text
    • http://impactpluslearning.com/ckfinder/userfiles/files/78856773146.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=tennessee+form+fae+170+instructions+2019PDF 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_off00020072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20072 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00021889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21889 11028 bytes
SHA-256: fadcd6bc914aad0726bbbd37e1ec5fb777d941dc76d7cb7307e25308cd23e68d
font_02_sfnt_off00023261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23261 19680 bytes
SHA-256: 5c9acbab4307d0b26e5013ba2106f3dabaac51ea459098cc7ec9209242d9c685

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