Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d9fa9a0fa930e5c…

MALICIOUS

PDF

77.6 KB Created: 2021-03-17 15:34:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: dede8ca3c858b2d44218ff42736e2e81 SHA-1: 6ad0d482f597ef66fde8135fba1b82b5c5d49f56 SHA-256: 5d9fa9a0fa930e5cce15e39ce6d35934fc6f9d291232a2d36880099d7c0e7c07
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URIs indicate it's designed to redirect users to malicious sites, likely for credential harvesting or second-stage payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/123?utm_term=3d+paper+penguin+template PDF link annotation
    • http://nunejabu.scienceontheweb.net/sesuzeximuxekumoxaf.pdfIn PDF document text
    • http://1freedom.space/86627774320grcdm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_602c7b4739f26.pdfIn PDF document text
    • http://rapisakaxo.66ghz.com/54154350177.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445321/normal_603f421018446.pdfIn PDF document text
    • http://hyipinvest.site/learn_korean_books_downloadmb29l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483335/normal_6018e78cc7c44.pdfIn PDF document text
    • http://dontbeshy.xyz/193807647230etsr.pdfIn PDF document text
    • http://mixed-rootwork.com/64430966823lm20i.pdfIn PDF document text
    • http://tiktoktop.design/49144647587acje4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419206/normal_5fcfea4ddd36e.pdfIn PDF document text
    • https://xedagiwaki.weebly.com/uploads/1/3/1/8/131856626/6605160.pdfIn PDF document text
    • http://jekebes.iblogger.org/16846943699.pdfIn PDF document text
    • http://5coupon.info/empire_halo_too_battery_cover2u0hf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_6016046fb0f6d.pdfIn PDF document text
    • http://hookup153.site/dead_effect_2_android_multiplayermphx1.pdfIn PDF document text
    • https://zotagozugub.weebly.com/uploads/1/3/0/7/130739891/8f4d37ee.pdfIn PDF document text
    • https://rakafofolobe.weebly.com/uploads/1/3/4/6/134649319/zawesuse-tejupozomipin.pdfIn PDF document text
    • http://pepirizibizedel.22web.org/free_cursive_alphabet_practice_sheets.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://donijexufenu.onlinewebshop.net/lg_washing_machine_smells_like_rotten_eggs.pdfIn PDF document text
    • http://jisunopesaluzi.atwebpages.com/manusia_sebagai_khalifah_di_bumi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD71 4940 bytes
SHA-256: 19919f9f1e5da51bbea4bbd455c8805181c5b4400b3aa8f1d0c15d48858b2cc6
font_01_sfnt_off0000ee10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE10 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000f69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69E 10556 bytes
SHA-256: f40bb085090382d63498034c9afb6800bd2ba467b9fc67cb135edfb7f2bb0381
font_03_sfnt_off00011a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A57 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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