Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea99f1f6c289db11…

MALICIOUS

PDF

77.7 KB Created: 2021-03-01 06:21:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: bd63f94862cc84e2b1ec3297e25f5259 SHA-1: dd9c96491eac5001d8f58cb167268a8e74ca6788 SHA-256: ea99f1f6c289db118c7ad86df246438e2cb1a278da1db1ca4fa9199e7b7ebc28
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, indicating a likely phishing or redirection attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that at least one URL leads to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=best+place+to+read+marvel+comics+free In PDF document text
    • https://tazipapanora.weebly.com/uploads/1/3/0/7/130776418/6c61f3bb31b.pdfIn PDF document text
    • http://pokezokebawi.mygamesonline.org/how_can_i_get_my_dog_spayed_or_neutered_for_free.pdfIn PDF document text
    • http://bobr.space/disney_princess_coloring_sheets_online61yht.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476943/normal_5ffd52fc98e90.pdfIn PDF document text
    • https://mokapojigum.weebly.com/uploads/1/3/4/6/134690111/4472083.pdfIn PDF document text
    • https://rosatavur.weebly.com/uploads/1/3/2/6/132695818/591372.pdfIn PDF document text
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/6656602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_6015e65af12fa.pdfIn PDF document text
    • http://proita.fun/robert_greene_author_net_worthfb7jo.pdfIn PDF document text
    • http://opencabinets.xyz/how_to_fix_my_samsung_tablet_black_screenb6xr5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454184/normal_5fe74e1aeba50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404500/normal_60238ddb3a89c.pdfIn PDF document text
    • http://winsl.space/nonopelazomapiwap7dcn9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466675/normal_5fd17594d9b3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447460/normal_6008df1359611.pdfIn PDF document text
    • https://dezirivudamowi.weebly.com/uploads/1/3/1/8/131856369/2064574.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/masimo_rad-8_pulse_oximeter_user_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458621/normal_602301dfd60c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470972/normal_60005e7b707dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445534/normal_60302b456a33b.pdfIn PDF document text
    • http://de-bewertung-889562.icu/death_point_mod_apk_android_1s0xid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zudupaxub.myartsonline.com/tosolepubuza.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18B 5412 bytes
SHA-256: 24c113b8e05967750a674bf22c2a1e7a88c724f05bc9ba981c1947e28a5f8965
font_01_sfnt_off000103e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E5 10500 bytes
SHA-256: 261030d6b116e05c25aecf4abdeec2c21ee73f937b6b2484450f687cb76a88ea

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