Malicious PDF — malware analysis report

Static analysis result for SHA-256 9107306879011127…

MALICIOUS

PDF

75.5 KB Created: 2021-02-22 06:36:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 587fd4bba37e231c2fe941203ec38103 SHA-1: 6f6b2ae3c0392b659d85cb03da646ebea149b540 SHA-256: 91073068790111279d47a5ac95f437c7f4ca11d4e8069d00e3b6e624f7b85a7c
134 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous external URIs and is structured as a link farm on disposable hosting, suggesting an effort to redirect users to malicious sites. The presence of embedded URLs and the overall structure point towards an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=east+haven+public+schools+ct PDF link annotation
    • https://ruzopujiwinor.weebly.com/uploads/1/3/1/4/131452977/ba1ba.pdfIn PDF document text
    • http://testertumentum.space/lazulidagugakmzgu1.pdfIn PDF document text
    • http://veronaital.space/257113502139a81t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372354/normal_60089ca3da4d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_5fe9d26cc4cbf.pdfIn PDF document text
    • https://bivufinemena.weebly.com/uploads/1/3/1/3/131380184/jeziteduwunarupo.pdfIn PDF document text
    • https://tekevifumufov.weebly.com/uploads/1/3/0/7/130739519/3644695.pdfIn PDF document text
    • http://trend-sales.fun/s_s_gathal_history_bookgfb3f.pdfIn PDF document text
    • http://lakshmi-store.ru/please_be_informed_ngha_l_gorzag.pdfIn PDF document text
    • http://bluebadgeform.com/4576975759ov1bg.pdfIn PDF document text
    • http://girlita.space/caccia_al_tesoro_indovinellir73ps.pdfIn PDF document text
    • http://okclub.org/purixarevopanonumobafosg.pdfIn PDF document text
    • http://teachost.com/miracle_thunder_crack_2._966ecao.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
    • https://s3.amazonaws.com/tizowodifi/34586350866.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/date_sheet_2019_ignou.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/11773496702.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_off0000d8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A4 4964 bytes
SHA-256: 9184630379772177a3fb73d699232e1a0742e34a3c400383bdaa10b5f53a45a7
font_01_sfnt_off0000e978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE978 13112 bytes
SHA-256: 5e695c345cba72ce8effb3d421f412d298cadd9e4d25f1df882ef12ab250f74b
font_02_sfnt_off000112fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FD 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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