Malicious PDF — malware analysis report

Static analysis result for SHA-256 0124c1830a296aa8…

MALICIOUS

PDF

105.0 KB Created: 2021-06-30 22:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 44cf4607c7229575bc5b54281ef7f42c SHA-1: 825fd5dcc77f6e9b78547033dc1b4d7d996309c4 SHA-256: 0124c1830a296aa8e79860d632b5da2dc4da4a71c044bd361debac8e436cebeb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload directories, suggesting it's designed to host or redirect to malicious content. While no scripts were directly extracted, the nature of the URLs and the detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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 https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4510ceb663---lonodixomap.pdf In PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b336b6216fb---godoled.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/1t5pl54radcdgs4iq8aa1g3r4j/jamedatu.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5856d55f2---rijafemetosogatitivinuvus.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/18657714871.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/vupiwu.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/nezebasikudeva.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/8nh8bcgfem8kvluiefi1s5g525/46707120842.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072dea6ede58---12793410154.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160da1a7f7dc02---49062261787.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202105/file/1620360970.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/sisawiforesibojulijinukuk.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16077186f7a940---kowuredagoxivavuliwisu.pdfIn PDF document text
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/22601512146.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1dc348a77c---jaxevakedageriz.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/dodalujinuse.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607554116731c---76308741108.pdfIn PDF document text
    • https://davaocarrental.com/images/file/batule.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160af5ce4a0bb2---xusiruzux.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/44969045274.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/14033189423.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/9c258acd6ee05c60fe648f273b5c8d4d/92304029391.pdfIn PDF document text
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/eb869a8c723f343ddb00f0861b35d9f4/55509668935.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16089fbf84ed9b---febisuladujoxavode.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=what%27s+the+worst+bone+to+break+in+your+bodyPDF 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_off000139c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C8 16756 bytes
SHA-256: f94c0e96892ae46f0808208bfcab1ad4b2f50cd8f42463b73a34337600d5bdeb
font_01_sfnt_off0001656c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1656C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D83 10856 bytes
SHA-256: 7da1c0b1ccc39b6dd8d4049bd9e6a88ae9735c2bf0d148ef82879e218ae1712b