Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbc58cd9f64427e…

MALICIOUS

PDF

86.1 KB Created: 2021-09-03 02:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c9105bba6ae302fd5d39c2cea06c3b29 SHA-1: a31814b450dfe1d01f1ea671697ac50f7d8e4f7d SHA-256: 1dbc58cd9f64427e663652713e468fad594eaee44279e5ebe3126a0b45b097c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links to external PDFs hosted on compromised websites, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate that this document is intended to trick users into downloading further malicious content, likely through a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 6

  • 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 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://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ed895f13e37cd6355cec90b07398c138/wepafitaxepafolorezuzig.pdf In PDF document text
    • https://giorgiosantinelli.it/file/vimuwozivobeloxazoratiwal.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/leboloxudejokuvi.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16096bb201c8a0---wadokirezitisibo.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160904fb2b737c---46978494782.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/getazutozefigo.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/wamirujotaveden.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/ad8a2c60562df7a5a39d354cded5e817/wijixexasevetamalodebeb.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/65370750630.pdfIn PDF document text
    • http://aweibel.com/Photo/file/13529674996.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/zewasige.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///wadirafonurowonuriwokur.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/161148ed220ccd---29171367730.pdfIn PDF document text
    • http://hncastlecable.com/d/files/54788477033.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbd4b8ef4c---89409535041.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/xuwanijow.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52a785aaf9---49866159199.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/64073872833.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/1510887666.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/salow.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bca2c4a3c---pilejapoxilofigomit.pdfIn PDF document text
    • https://davnosti.ru/upload/vibina.pdfIn PDF document text
    • http://encino.kopanramen.com/uploads/files/nogudolozimadivi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=download+pdf+reader+for+pc+latest+versionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012e8d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12E8D 17952 bytes
SHA-256: 503b50724840392b2e55c7cc93a4c6592e9ef9568ff3a6686ffa0c8ad6f8e443
font_00_sfnt_off0000d2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C7 16564 bytes
SHA-256: cc5c91102aeb328ca5d42cddc287165407605cea85a0c72e0497d46984dbe10b
font_01_sfnt_off0000fd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A0 10768 bytes
SHA-256: fad2416460993c0928ee2d882b297cb6f29db60319c6a1ce2351eb720e3a69e6

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