Malicious PDF — malware analysis report

Static analysis result for SHA-256 d241337271c01e00…

MALICIOUS

PDF

180.4 KB Created: 2021-07-09 06:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c3b8956738eb987bdaa1371da74693e6 SHA-1: 269d253356a9885387e8776ff252fe77c9e169c5 SHA-256: d241337271c01e002a06ba7d04c6a63d0cbfdc1c25eb679190a17306f546d599
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8882

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.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8151b81a3---84748345849.pdf In PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/e3db184fd224f276b2bb0d656b1a5803/2157195610.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/15159822991.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16076269563aa3---genapavikunisivoneden.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/65830567890.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/lusirozunekiwozizemamim.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/84612567753.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b57c0b7cabb---16143948691.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160dbcf78bb692---najebu.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/jufewepiwanezanukujejak.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608687cab9658---fixoviji.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/a94a157e1f01ca501816af5c8119a49f/gigalipopubegosuno.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607201363cdab---2311295999.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acc7557b509---pikalok.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/gamikobo.pdfIn PDF document text
    • https://promise-land.com/upload/file/geroge.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/solibotivugonun.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/7939d8801e689cc0b20063765e3ce371/xakiwuvururalufipabanu.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b03f449e72---sewajoleratusikifix.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/f89a48e633a8b9464936cb8453543df3/24779632124.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/78230225417.pdfIn PDF document text
    • http://simonide.org/userfiles/file/gesumed.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/th8hnapor7dkpeuhfn85j8e83r/97214442696.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/ktat5i21k7jtc6jok19hvetqs2/96723313235.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=succonded+meaning+secondedPDF 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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00021f7a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x21F7A 36192 bytes
SHA-256: b034038f600f4875f172314b0ea4c4bb1cc05b48093e109707073f02d2ec7611
font_00_sfnt_off0001af8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF8C 10644 bytes
SHA-256: 392a06ae44d8cd198caeaf0f07762bca27f56937c3724ec5a5be62b082c62092
font_01_sfnt_off0001c7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7A2 41952 bytes
SHA-256: e7c89278c34447881cb027b0ad31be8847f93bb660b9b4b5c8bbbe6ba59ebc3e
font_03_sfnt_off000261ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x261FF 25608 bytes
SHA-256: e898049753b6fd281dc810857a3b0c02393103e33801a9349f07dd4b4dcf4476
font_04_sfnt_off0002aaf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AAF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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