Malicious PDF — malware analysis report

Static analysis result for SHA-256 091a6662633edf46…

MALICIOUS

PDF

88.0 KB Created: 2021-07-07 19:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 7ef1524e71444b04b5d2d2a4880fb8dc SHA-1: 1d5b796dcc02964ae10a40a46e9aedc4d3c386fa SHA-256: 091a6662633edf46cbf26a46903df4cb4020df7813dca436926e9b44ad1128b0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised CMS platforms or disposable domains. While no scripts were explicitly extracted, the presence of PDF URI and random URL link firings suggests the document's primary function is to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://luingpyrex.cz/foto/Image/file/35867978068.pdf In PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/ktl3i7cc2ed1lu5nsh2n5mc8l3/jewur.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48df69d6d2---55984417052.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/gazozobamozexilame.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/aklojp1bc3jura27iiso3hiaod/fugumuwopovederadiri.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/0bc50c523952470351434c872fdd3a94/ribajowavajuvoratasofu.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/manodejovenilomuk.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/29446076108.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/bovubebotala.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/gesakoxati.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ad3c489ae---tirisul.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9854749998---sedipodotuwolajejetifokab.pdfIn PDF document text
    • http://innotack.com/userfiles/files/84063548363.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/a21fa4fa5d9c939508b29263e1f5e949/zugetipuzasiwotomowib.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/joxidawazakir.pdfIn PDF document text
    • http://china-miyaco.com/img/file/2021617155146.pdfIn PDF document text
    • http://theshippyfamily.com/clients/57051/File/30505562324.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609d283d242b5---47453989464.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/26788027046.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/62232065080.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/widoteburadetopawi.pdfIn PDF document text
    • http://rld-carbon.ru/file/tinegoxamozuwotugekimek.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/bs6cnmn1j2vuotjn337h9b5ua4/sidadawusozasor.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5ff0bd693a---56635221168.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=clash+royale+chest+drop+cyclePDF 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_off0000f6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F5 16640 bytes
SHA-256: 954cc3493659c55d6734f5a86d69d5ac3a778a91e82fa7d4320dde169ddd4a4c
font_01_sfnt_off00012212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12212 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A29 10560 bytes
SHA-256: 28da470d7fc94001243e630bbd004c311134591d6018c5e351b7a267b0e24c31

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