Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc8473bd16bafc7…

MALICIOUS

PDF

79.3 KB Created: 2021-09-02 18:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8cfcd2d964fb841a3c274bd25d87c419 SHA-1: f21b03b102a53bd5c9b4641b0707d744d9d78b8c SHA-256: 1fc8473bd16bafc752240ae5dc058c1874f8a35a83e03752c22ffc60c959ac65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous URLs, many hosted on compromised or disposable domains, suggesting a link farm or phishing lure. Heuristics indicate the PDF is a link farm and potentially a phishing/trojan delivery mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://oniceh.ru/uplcv?utm_term=nissan+note+2015+service+manual PDF link annotation
    • http://immobilieninvestors.eu/userfiles/file/widuxuvuratesig.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/63508260462.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3d226e95e3---temenumevelufudu.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/kul0sap5psj0pref20m1rncb28/38857023199.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/c7fc064ed2d63507f889d29d325ff41d/natukuve.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/59955866158.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ae5d86d711---36107877322.pdfIn PDF document text
    • http://0965818789.com/CKEdit/upload/files/saxusedese.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160862ff6623f8---povezawem.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/73818414624.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/97104058138.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/e9c84a5a3df8f4deafdbe51ecde3adc6/99027074048.pdfIn PDF document text
    • https://usssecuritate.ro/userfiles/file/fosejetunizop.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/fijikerijetew.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160932330f4169---repamodume.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/2uksagf8ehbbfgs1l9ft4bfo25/xudanajoweneka.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1adf1051c---wumasukikururinetokevoli.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609687ac24f08---wesewu.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c55c10de080---telawirek.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/fomeza.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/belofetugunete.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/sabixosibidugetabixobego.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/sikuwesupevu.pdfIn PDF document text
    • 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_off0000cf67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77E 10964 bytes
SHA-256: 8c43d812b05966642bb8275cc321b1c3dde1c1123d8865d4531f8df0029c7f62
font_02_sfnt_off0001011b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011B 18000 bytes
SHA-256: f22b2d43e4ac29095565e8aab62de6d46b5ab9819efa6e6a176b537b76cf22df

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