Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8d806f03498b1b…

MALICIOUS

PDF

71.9 KB Created: 2021-09-19 04:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 24f5c616c59217d58a1868d0aac3251d SHA-1: 4f1e210623f44148fce9ec05fefbdc96366c8a94 SHA-256: ea8d806f03498b1bfdc77a6832fd5588a050d6044bcd96f6cffe858b4b83095f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs and is identified as a link farm, suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for these links, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=minecraft+pocket+edition+cheats+apk PDF link annotation
    • http://www.pranabkumar.com/fckimages/file/luzuge.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/11351208671.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/34356351137.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/pogiwadomogosudumejikifig.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/70195a7bae9760cd6fd0a4b5bb5a5dbd/zudanuvotufazopawop.pdfIn PDF document text
    • http://eichler-kammerer.de/81753952425.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/75110985586.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/65225269644.pdfIn PDF document text
    • http://lg-palette.com/upload/files/nezujabobopofivofurinuf.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/pebikoxerusal.pdfIn PDF document text
    • http://modero.vn/upload/files/dagizatisawonekafebudu.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/71811108698.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109021051412204.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/36847105495.pdfIn PDF document text
    • http://stroyvodservice.ru/upload/File/12326077659.pdfIn PDF document text
    • http://secretinvitation.net/images/files/tatalowenotakuzeluribemu.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/zedudumoxujipuwomax.pdfIn PDF document text
    • http://kdwatch.net/upload/files/2021091721100618.pdfIn PDF document text
    • http://tpfish.com.taipei/archive/upload/files/lomexurasofobazevukix.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/4801896718.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_off0000b8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C2 16092 bytes
SHA-256: 794c585c6766fb7d0ccd1ef3fa3b41a36f34b7de44a126f1e5593a7d24a66858
font_01_sfnt_off0000e1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EE 10756 bytes
SHA-256: 622f278ef3e11a7a160195a6220c33937087c7762069836161187d4c69a67b5a

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