Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7de5bdc073ee7e8…

MALICIOUS

PDF

161.7 KB Created: 2021-03-18 09:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3a22e25e1270f226c4bc9c4275be9312 SHA-1: 212fdb647f2c62c3d4a06e6563c6210cb64c99fa SHA-256: e7de5bdc073ee7e8653e00cd7925c2d96876eaf7ec99ee5d12d509e85a19029c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/award?keyword=alfabeto+griego+pdf PDF link annotation
    • http://mazezoda.22web.org/8341698166.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/noninuvimajogesenave.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449395/normal_6007a5f9a8b4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484610/normal_5ff0ddb8862ef.pdfIn PDF document text
    • http://tesar-krd.ru/37889018824v7m9u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405409/normal_5fd1234102e63.pdfIn PDF document text
    • http://defi-bet.world/22023271696or2qi.pdfIn PDF document text
    • http://lanasobewusek.22web.org/xuwuzonexolojuxogov.pdfIn PDF document text
    • https://xedagiwaki.weebly.com/uploads/1/3/1/8/131856626/4213081.pdfIn PDF document text
    • http://aydym.club/943703176827lfio.pdfIn PDF document text
    • http://zomolejefej.mywebcommunity.org/pisigonisagazinife.pdfIn PDF document text
    • http://nat-fru.space/isocrates_against_the_sophistsu98u7.pdfIn PDF document text
    • https://memozarukun.weebly.com/uploads/1/3/4/3/134378051/poxevegofolage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478378/normal_601a197e8097f.pdfIn PDF document text
    • http://uablog.site/funciones_trigonometricas_cotangente_secante_y_cosecantetlogj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://defasawune.epizy.com/baaghi_2_film_all_ringtone.pdfIn PDF document text
    • http://rozipiliwune.epizy.com/imprimer_les_formules_dans_excel_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/linaf.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/kamovupipizigefoxijejo.pdfIn PDF document text
    • http://zirutabu.myartsonline.com/calisthenics_for_beginners_50_bodyweight_exercises.pdfIn PDF document text
    • http://penanaras.myartsonline.com/ryobi_10_amp_7-1_4-inch_mitre_saw_canada.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bdfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDFD 5160 bytes
SHA-256: 1792f8da1ff1d9d16717c9a06e7c20b45ce2837003de8ae9992c68133e32eaa6
font_01_sfnt_off0001cf91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF91 1976 bytes
SHA-256: ba4fd84f32e1263c3c19ce854c490ef848185f1ff6a26de7513d76211563d7cd
font_02_sfnt_off0001d916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D916 75976 bytes
SHA-256: 46dae82391c25a269567a8c1d0d892ccddce88212039b6e2264dcb27e9ffa5bc
font_03_sfnt_off00025fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25FBF 16544 bytes
SHA-256: 7a429071660d5f8e025aab0bc162ef3597bd1781efa9ffdea2298830440460c7

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