Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38c3e0c5cd065fe…

MALICIOUS

PDF

79.2 KB Created: 2021-02-07 16:53:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0f7b5381bf888d4bc7dedebfbcf80fd7 SHA-1: 4b6264a1c5809711420b19549e5f7ad70340918c SHA-256: c38c3e0c5cd065fe4c944e3ed436d792f2b8b269d20c328082568d79f565a330
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to 'backsplash sheets cheap', likely intended to trick users into clicking through to a compromised website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/wb?keyword=backsplash%20sheets%20cheap PDF link annotation
    • https://finowizefi.weebly.com/uploads/1/3/1/3/131383614/8113427.pdfIn PDF document text
    • http://nijubuwuw.iblogger.org/mamuza.pdfIn PDF document text
    • http://sweetygirl.club/slim_fit_cafe_racer_jacket3hzll.pdfIn PDF document text
    • http://expressvpn.store/d_d_descent_into_avernus_downloadwu1zl.pdfIn PDF document text
    • https://videxopejevis.weebly.com/uploads/1/3/5/3/135333638/4724269.pdfIn PDF document text
    • http://servisvds.ru/dipefamuvosevamjehhv.pdfIn PDF document text
    • https://fubuzupa.weebly.com/uploads/1/3/5/3/135324320/mokuwagije.pdfIn PDF document text
    • http://sosunimepewe.22web.org/corrective_preventive_action_report_format.pdfIn PDF document text
    • https://bafexobis.weebly.com/uploads/1/3/4/0/134041027/pazisukos_diduvefaz_golidigesukela_geledevo.pdfIn PDF document text
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/mejusipudus_tusazoxug_mejulinoboj_fixetutumejo.pdfIn PDF document text
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/6748092.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/dotivaf/akinator_vip_apk_6._6._5.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/35265919546.pdfIn PDF document text
    • http://zosenesewil.rf.gd/xasereturizis.pdfIn PDF document text
    • http://gugamofizuxeg.epizy.com/chrome_browser_app_for_pc.pdfIn PDF document text
    • http://demajipo.rf.gd/74853527182.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/airport_guidelines_for_carry_on_luggage_size.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/boingo_tv_guide.pdfIn PDF document text
    • http://bumojito.rf.gd/99543039738.pdfIn PDF document text
    • http://jekojefakowosep.rf.gd/lagu_man_ana_versi_indonesia.pdfIn PDF document text
    • http://mapakipoborepuj.epizy.com/afcat_2015_answer_key.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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 4564 bytes
SHA-256: 8848b9355597c066ffaefe485fdb767ff2bbdbd647c5c95ae22581c61121a224
font_01_sfnt_off0000faf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF8 10772 bytes
SHA-256: 6dd3ca822dcdd9da5fdc33100f30bc0b7e8ae08231efe7d8a85ad6bddf87b54c
font_02_sfnt_off00011fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCD 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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