Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d44634d7c89f446…

MALICIOUS

PDF

95.6 KB Created: 2021-06-28 19:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 50a50cf2f74ca1090c39aa135c74eb35 SHA-1: 07a5538885f09f5ee7fcdcac6e4d02ef6776bb4a SHA-256: 7d44634d7c89f4469dc5fe9e4bb1ef38e7337fd3c11866b580eb22b386f88566
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and the detection as a trojan indicate a high likelihood of malicious intent, possibly involving the download of further payloads or redirection to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://kompletucetnictvi.cz/files/file/nuwifawevekeda.pdf In PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083589f8827e---folara.pdfIn PDF document text
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/0dcd3262c24bb6cb1d8080b2cfa2c8bb/nurudutuvi.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/370a53574c20414691c08d63273dfdb8/webugetugit.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/0ffafd9ce8b45983cf56fb5c9668847f/gudexikifusupabinetetis.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/wurosapujubosavov.pdfIn PDF document text
    • http://modern-pro.ru/files/file/39903462499.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c5cc154e8---96612584927.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/5f33482ecfe4475abb4a6308cee72a2f/disixelubajaxugopir.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/4d181aa0e9568c88108c68d4406de914/mejikaledafevofinusofex.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/ll6ht4ut6hsmaa0773mtl9hf23/sixamagipewazoniv.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc7c0d4b27---51244642653.pdfIn PDF document text
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/ugi0tc2lke7ut804jmifjjp0i7/natub.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ee1b8b07f---77683661779.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/fv0ujq7ego9shkhgab0ir0gns0/90865229708.pdfIn PDF document text
    • http://santeh.md/img/files/37783743125.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/buzofiz.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16075a5fe384d3---fidikaj.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6d1835ee5---zofemiwix.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce0ea7435c---27881556568.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/3qu2s3s1gtpcd5oa309di0r3gu/tiguxixanevujinosuto.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/80700762236.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/7ca57eac6963b547c60f29bf085b389d/zilojigekojowubebimo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=if+else+example+in+shell+scriptPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6E 19680 bytes
SHA-256: e8aa1c852b2f24fd900aed0b0041cb97e7019db31723b573bd10a5f7050a4945
font_02_sfnt_off00014037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14037 16660 bytes
SHA-256: 038a3c3e7cf3dc25ed2dac763ba044e6511e8ade75ea9e46e461a74a8ad97993
font_03_sfnt_off000156e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156E6 10676 bytes
SHA-256: a0ca40b12a7bc704cddc8c62e88c7e0f7e0691673a2a0f71c7748e0007bead6e

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