Malicious PDF — malware analysis report

Static analysis result for SHA-256 434e8cf9c93f2c24…

MALICIOUS

PDF

74.7 KB Created: 2021-04-12 10:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ba5cef9003bd78cd761574658cb3bfdd SHA-1: 290f0c9c5f9bf10b46e7e377f4ccf30113dc0bad SHA-256: 434e8cf9c93f2c245108e855de2e9f50b9e0df1dcf241f0245f96b67392885a9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document body and embedded URLs suggest a lure related to internet services, directing users to potentially malicious domains like golowaki.ru. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=how+to+get+internet+only+with+comcast PDF link annotation
    • https://xuzomavarek.weebly.com/uploads/1/3/1/3/131383242/potukuvejonow.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/60368069786q21gy.pdfIn PDF document text
    • http://idealicaitaly.site/hakikat_metode_pendidikan_islamd26gk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405440/normal_606e2edb15b01.pdfIn PDF document text
    • https://pemejelusapi.weebly.com/uploads/1/3/1/3/131398576/f2f6a5a18b.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/tafexesepatop.pdfIn PDF document text
    • http://fb-ig-copyright.com/65055103314iajas.pdfIn PDF document text
    • http://capridigi.com/mn_drivers_license_renewalfawd4.pdfIn PDF document text
    • https://kuserivexujeza.weebly.com/uploads/1/3/4/3/134331384/zefujunimaxepos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460975/normal_6040ed51ca1aa.pdfIn PDF document text
    • https://lupunudarowujak.weebly.com/uploads/1/3/4/5/134599946/jexute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_60579cf5569d0.pdfIn PDF document text
    • https://zedazepofa.weebly.com/uploads/1/3/0/9/130969939/6878217.pdfIn PDF document text
    • https://zitupakunetod.weebly.com/uploads/1/3/0/7/130739751/rutanewumumiwe.pdfIn PDF document text
    • https://modefijibig.weebly.com/uploads/1/3/6/0/136011483/8873346.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zinudipir/dopalidevi.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/apc_back-_ups_xs_1300_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/xifinarisuji.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/99253199349.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/the_bluest_eye_google.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/shake_the_papaya_down_piano_sheet_music.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EF 5368 bytes
SHA-256: fa941a026dc2acfdc9032e0f846cd5660c634dbfca2ce71a73b1baa9c34e4c0a
font_01_sfnt_off0000f821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF821 11016 bytes
SHA-256: c3f280ba186c0c7d7a84bed351946115342c1e03038ed5ee09c8b1fa17f1edf7

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