Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4f6d2dd9c6c415…

MALICIOUS

PDF

83.4 KB Created: 2021-03-18 02:44:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8efb2f882ed68acdbd18536e6b0fe85 SHA-1: d942a8d4caf64e47ee3688bcac1f704dc4ce7016 SHA-256: 2e4f6d2dd9c6c415aba43e07ab41bb8a9895aeaabda3276f25cc73070c992766
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including suspicious and invisible links to external domains. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution document. The embedded links, such as http://ig-supportcenter.xyz/40526952169i57ni.pdf, are likely used to redirect users to malicious sites for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://ponafet.ru/strik?utm_term=neato+botvac+d5+replacement+battery
    • https://cdn-cms.f-static.net/uploads/4375525/normal_604ec97e8ad88.pdf
    • https://static.s123-cdn-static.com/uploads/4421468/normal_5feec24982926.pdf
    • http://xamoxipuwizutux.scienceontheweb.net/motorola_xts_3000_battery.pdf
    • http://dehydratedoriginalgoodness.com/golegar3edw2.pdf
    • http://ig-supportcenter.xyz/40526952169i57ni.pdf
    • http://jedilinosur.mywebcommunity.org/80308714711.pdf
    • http://youtube-subscribes.com/voxojoladapogolezukxmvje.pdf
    • http://paypallsecurity.com/32513119328pjb26.pdf
    • http://fsfsfd.xyz/141817786720b8f9.pdf
    • http://am-sound.ru/toyota_corolla_2016_key_battery_change5kfww.pdf
    • http://iranianvc.com/21940784547rkct6.pdf
    • https://cdn-cms.f-static.net/uploads/4446774/normal_6046e476a6b00.pdf
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5fda4a5846439.pdf
    • http://helpcreditscore.info/kipavugexegefotekeba2e1wk.pdf
    • http://tizakeguwowil.22web.org/beowulf_synopsis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fifuto/penojilupetipiguzumew.pdf
    • https://s3.amazonaws.com/jebokizez/66194949908.pdf
    • https://s3.amazonaws.com/vososasoxumete/russian_eyelash_extension_course_near_me.pdf
    • http://nawevoted.epizy.com/ap_intermediate_zoology_textbook.pdf
    • http://monimupanib.epizy.com/8671182220.pdf
    • http://vatimofaxemog.rf.gd/kerangka_acuan_amdal_rumah_sakit.pdf
    • http://xotopusedewix.myartsonline.com/alter_ego_a1_methode_de_francais.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9c3.bin
0211b59bf1dfc1b9225acaf9e03459ed394b605f52e9537acec606a8875a5c55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C3 5176 bytes
font_01_sfnt_off00010b4d.bin
3b2a5fe82eaa04257d83382b55718a168c9863a17e1d202ddf1da3ba8bfd5273		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4D 10772 bytes
font_02_sfnt_off00013022.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13022 4324 bytes

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