Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cfb70d813edc315…

MALICIOUS

PDF

93.5 KB Created: 2021-07-19 19:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: efe340e64415dd88f116c4ff97c52825 SHA-1: c01b14305f9dbaffe0a8c99f3c67b97e1b2e2e30 SHA-256: 9cfb70d813edc315ff0be5f4cef216e12154bb086e0114cdeada621dc0b240c9
176 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 phishing or trojan threat. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick users into calling a phone number, a common tactic in tech-support scams or callback phishing. While no scripts were extracted, the presence of numerous links to compromised CMS upload directories and disposable hosting points to a link farm used to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/t6iltb6uemuhuqqii002vpecn8/25386840941.pdf In PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ec52c429024---30294307776.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882be1c7b96---dipazoperutakaba.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/t2c9bptp75mrl259l4l6qt0iv6/figozi.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0ef0adb192c4f799b496ddab63e7c59f/nevemozodojonodoxelevipi.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/36562034769.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/donuladolodazipinukelal.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/e7kmu3o258tn0blbu4lb94o7dn/pebox.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/5c9ktdvs5d0v50uvu7pacnbch9/xaruxekesolawodebigomi.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/30609189440.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/27254226267.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/379d82f29d4103787d8de613eb64b9d4/993687168.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/werix.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/21316b5f8c5e75d1e808d414ba31189c/67113792319.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9eafe488b---85532018618.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/fenikofesujuz.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/f4eanks4hqf5mg8lquhfn15dru/parowajifupugin.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/75274513492.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078df45b50fa---5287245020.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c705da954---fuluxad.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/65930968404.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16074d0c521eb1---43941044290.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=isomers+of+pentane+structurePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE3 10552 bytes
SHA-256: 7c120449bbf9040e79aa88cc13edede9ab0081cff4ecc7c9c19a1ffd941a79b4
font_01_sfnt_off000122f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F4 17552 bytes
SHA-256: 3aafe175ab8249a7682626d62ac79e0e1f38e101827b91ff2639bc82453352e1
font_02_sfnt_off0001510e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1510E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.