Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ce8016f1a8c6d6…

MALICIOUS

PDF

79.9 KB Created: 2021-02-04 11:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 09e2119c505336ea98e7676566710bec SHA-1: 6afb691f3ec13e43fae33f35f87b43370e73aed7 SHA-256: 49ce8016f1a8c6d66f5d4cca42a605acec923167d65b4a6329303816300c1e02
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external links, many of which point to disposable hosting, suggesting a link farm or phishing campaign. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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
  • 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://bologen.ru/wb?keyword=boltt%2011%20fantasy%20app PDF link annotation
    • https://sazejibapox.weebly.com/uploads/1/3/4/8/134863873/mewen_fosenit_nefemelix_lukaxo.pdfIn PDF document text
    • http://idealicacolumbia.site/calendar_2020_marathi_kalnirnay48a4d.pdfIn PDF document text
    • https://zewadozodatigi.weebly.com/uploads/1/3/4/3/134337643/c84842.pdfIn PDF document text
    • http://rigizaba.iblogger.org/9671126255.pdfIn PDF document text
    • http://kengoru.space/meat_log_mountain012vm.pdfIn PDF document text
    • http://alisaborodaenko.design/instant_email_t-_mobile_loginee25p.pdfIn PDF document text
    • http://christinaanddavid2019.com/nenunumijazutipyifla.pdfIn PDF document text
    • http://ersoil.fun/arabic_malayalam_dictionary2j9s8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369927/normal_5ffcbe11018fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393759/normal_5fecbf78dbd50.pdfIn PDF document text
    • https://nuxajitavira.weebly.com/uploads/1/3/1/8/131871558/2c6dd4d.pdfIn PDF document text
    • http://fruit-ital.space/vigujiwebofufujatifoyvq0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417314/normal_60023e6a1c027.pdfIn PDF document text
    • http://50offstore.pro/momelorokehdmfu.pdfIn PDF document text
    • http://gratoraama.space/wutuzumadupulesuk4nkmk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tinijev.epizy.com/spotify_apkreal_ios.pdfIn PDF document text
    • http://sivokag.epizy.com/warner_brothers_studio_tour_guide_jobs.pdfIn PDF document text
    • http://gifesikubelazu.epizy.com/pharma_braille_fonts_free.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/integers_word_problems_worksheets_grade_8.pdfIn PDF document text
    • http://kavimefejemud.rf.gd/incident_report_format_letter.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 4624 bytes
SHA-256: 475ce63802a9f50c018c800948fe88bd4bda3faf3275dafb271dae831c97a3bd
font_01_sfnt_off0000ff00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF00 10816 bytes
SHA-256: 751cadb2c418a4e2fe51ba9cb011d919c1398303a699bcc461a5231bfc550355
font_02_sfnt_off000123f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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