Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd381b0fd243294…

MALICIOUS

PDF

76.4 KB Created: 2021-03-02 18:16:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6b0b5837b5004a43d035735a751d1c2b SHA-1: 391635632f099b349bb67c31ecc055033a33c5cb SHA-256: 8fd381b0fd243294135b53ecd24aca01eda65b866d1305b50f95949836d5321d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=best+resistance+bands+uk+2020 PDF link annotation
    • https://zogeliwev.weebly.com/uploads/1/3/4/3/134353139/nunagipisanetus.pdfIn PDF document text
    • http://shopsupergood.site/free_autism_stuff_2020_uk8yja6.pdfIn PDF document text
    • http://ecoterritory.store/do_trane_ac_units_have_a_reset_button39b68.pdfIn PDF document text
    • https://notetezowinebax.weebly.com/uploads/1/3/6/0/136019470/mepagom.pdfIn PDF document text
    • http://ourfanz.com/482046410833fbmx.pdfIn PDF document text
    • http://jewlgems.com/what_are_the_5_languages_of_love_wiki03jgg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_5fe3fca448794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_603af0ed4d171.pdfIn PDF document text
    • https://xoxisosozujuna.weebly.com/uploads/1/3/2/6/132680853/1b65ed73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423137/normal_6003bfea15224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_603ddf2f481b9.pdfIn PDF document text
    • http://hotsales-com.xyz/kaxivekavevom0ywki.pdfIn PDF document text
    • http://jujiwaneko.iblogger.org/farm_animals_and_their_homes_matching_worksheet.pdfIn PDF document text
    • http://lovelyhouse.online/buxapaxilepemimixkl.pdfIn PDF document text
    • https://kivasemav.weebly.com/uploads/1/3/2/6/132680863/7654272.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/82e018af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sejonigimanam.epizy.com/pubg_awm_gun_ringtone.pdfIn PDF document text
    • http://modejaj.epizy.com/xeliwafojasinesonawusox.pdfIn PDF document text
    • http://wezojepodi.rf.gd/ernst_and_young_asc_606_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE06 5428 bytes
SHA-256: 966ad825254fd47a6f7ad2f91e45b5f064bdec67f46775d0e946d18c0baeec9b
font_01_sfnt_off0001008b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008B 10604 bytes
SHA-256: 7398c9d556ea26b34331e9488fa0f5b2c6c3d1814cd0506e768f0bf068320d7d

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