Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70de96e38b3e3e5…

MALICIOUS

PDF

76.9 KB Created: 2021-07-24 18:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8284b86cc7d797777002cb2ff30e1845 SHA-1: b6095f8372ac53e9a7f91862b655822daf538313 SHA-256: d70de96e38b3e3e5ee0baa1c0ccf77a5c2a0267c58d0a2c69d7e39e4231d8147
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users. The presence of numerous external links, many pointing to compromised CMS uploads or link farms, suggests a phishing or credential harvesting campaign. The PDF structure and link farm heuristics strongly indicate a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kisikana.hr/userfiles/file/50893036672.pdf In PDF document text
    • https://fotokeramika.bg/userfiles/file/mesinan.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/vajevugarikonamap.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/7e698dfaba3d2a5085aec77da5b1222b/68402142884.pdfIn PDF document text
    • http://prestopc.it/upload/file/putexokof.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/13140392157.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/63072416825.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/bemuvi.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/muxikokoduwufipufid.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/fdofheq3mrevbbdiri03idqfgk/77701911147.pdfIn PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfa350e80d---65590868121.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/29degdcqc0h0a0nqdqta24sl5h/23453600208.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6a1de9144---zibomegokogosobitisulonip.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/95734191785.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/dcd3eb9e9dc63a5c1a72dd3135d325ef/musok.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/c2fe68dc96b930e83491023318c42c27/66830691870.pdfIn PDF document text
    • http://stonebreaker.at/36071218665.pdfIn PDF document text
    • http://ourdesign.hk/ckfinder/userfiles/files/tulitalotobokelukinuwi.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e2da8fce26e---29234214789.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a8638e05d25---85352706124.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/wafaxirozinakirotil.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/af9c059fdbac072f8b0fd2d5de41fe87/xenuwoparatewexa.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607afb2e7216d---7738373621.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/73338604538.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=what+equals+112PDF 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_off0000c975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC975 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18C 10200 bytes
SHA-256: 23f2d8bbc22fbbaaf11ff8e0c128356624044629e8adea1fa398c8b14ee71760
font_02_sfnt_off0000f8b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B7 17016 bytes
SHA-256: 96debdc1bebb12668cd76541936d79d7b8a191fe892efb2d4fbdbee046a1d610

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