Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a666328aede0a44…

MALICIOUS

PDF

74.6 KB Created: 2021-04-06 04:02:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9cd71adf3c10e156a2b992e5fdcdd207 SHA-1: b70c0436c9f622c8817e5541464b4958b4092547 SHA-256: 2a666328aede0a44a5b000eff7946b741f04cc6295031fdcfb8157e38b5ffccf
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly indicate malicious intent. The document likely serves as a lure to direct users to malicious websites, potentially for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/strik?utm_term=acer+aspire+v5-431+battery+not+charging In PDF document text
    • https://muruvusi.weebly.com/uploads/1/3/4/5/134598427/nedilo.pdfIn PDF document text
    • http://cabinetshq.xyz/wejobojidizajabia30ut.pdfIn PDF document text
    • http://katopikinu.22web.org/fitane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412584/normal_6059e3e7cfd01.pdfIn PDF document text
    • http://hesap-al-sat.com/possessive_pronoun_exercises_onlineyfzdk.pdfIn PDF document text
    • http://fruitnaturs.space/los_deberes_de_ciceronoc7d5.pdfIn PDF document text
    • http://copytoshka.ru/libro_de_probabilidad_y_estadistica_telebachillerato_sexto_semestre_contestadoeze0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369930/normal_604f67740fb5f.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/6884742.pdfIn PDF document text
    • https://tirilume.weebly.com/uploads/1/3/4/8/134886795/munudijixi.pdfIn PDF document text
    • http://kebotup.66ghz.com/70887561503.pdfIn PDF document text
    • http://raisinshub.pro/rapitolobegepozoo7jfw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tujajolurasa.rf.gd/89482487638.pdfIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_80f2982a83fa4d7888aae49fe12dabac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/72967063080.pdfIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_5e7e7fd0eee4410b96d9acf979ec4b81.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/best_social_artist.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/sobasuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/mufonozeradovaluk.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/motorola_cdm1250_pinout.pdfIn PDF document text
    • https://8e75e8be-0f37-480b-85ac-641553c1acf9.filesusr.com/ugd/a4a1ce_18c23672a38747eea5989c5c19b27b4b.pdf?index=trueIn PDF document text
    • http://satosawinesuf.rf.gd/41912481882.pdfIn PDF document text
    • http://zekonumusew.rf.gd/77765668355.pdfIn PDF document text
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_62e44efd66eb4916b1c115af5b796795.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE342 5912 bytes
SHA-256: 86548e3a2cf2c6e327504343bb6f49080c8564f7c9aedfda7878e652a8ab9ead
font_01_sfnt_off0000f784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF784 10992 bytes
SHA-256: 35ff67e2bee00e5b34600cb8bb81ee53d93792c0ec620d0f5ac7455878015df2