Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d366ff4155373bc…

MALICIOUS

PDF

80.8 KB Created: 2021-03-16 17:20:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4c593ff47f1e0040a05b26c410d9d731 SHA-1: 7a30ea58ee6e7d85f316f39418062e95dea332a9 SHA-256: 3d366ff4155373bc40413a9d6f1589df885a3b46923e789178a1453d521d2f79
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or spam campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically flags the sample as a link farm on disposable hosting, reinforcing the phishing lure interpretation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dugedepap.ru/award?keyword=agriculture+business+plan+sample+pdf PDF link annotation
    • https://cdn.sqhk.co/kuruwoke/aShdAgc/water_parks_in_orlando_open.pdfIn PDF document text
    • http://instahelpforbusiness.com/diastasis_recti_exercises_postpartumltm0w.pdfIn PDF document text
    • http://seamanygau.best/cosmos_carl_sagan_audiobook_downloadyxo4j.pdfIn PDF document text
    • http://kinoogf.space/dabawipifo7wefi.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/djciiii/hearts_fc_news_bbc.pdfIn PDF document text
    • http://imedo.ru/percy_jackson_and_the_lightning_thief_chapter_1b7ini.pdfIn PDF document text
    • https://cdn.sqhk.co/jalotenabo/grgj1py/kexusumexeteropifit.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/eyghggv/31971287175.pdfIn PDF document text
    • https://cdn.sqhk.co/gunakawujo/T0sggZt/74141882496.pdfIn PDF document text
    • http://arbitestpark.xyz/limuvpeu20.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/furisewofoselixavow.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/Lhahfgd/chambers_dictionary_apk_free.pdfIn PDF document text
    • http://forkidsshop.online/dr_eric_westman_ketogenic_diet_foodlzw0g.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/46ihiFv/criminal_case_vs_civil_case.pdfIn PDF document text
    • http://daating19.site/texas_cosmetology_written_exam_study_guideltjn1.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/bSkjbD4/8966719520.pdfIn PDF document text
    • http://losqutoq.online/93808337563teljh.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://wojibikifi.myartsonline.com/what_is_a_frozen_lake_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61ef7780-7a67-49ec-bfc2-7691a4d9f882/71869690126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/336f30df-b678-4ef3-837b-5ac261aaf2a5/2019_international_finance_corporation_grant_program.pdfIn PDF document text
    • http://zijedan.atwebpages.com/waxekifatomizuxowevuvide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a80f39-5235-4fda-bbad-a47c1544646b/82185809406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/042d6858-6c14-4265-8c23-de9949b6d073/70022382718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c3d90b8-9b1e-4a75-b8e0-3b0af6fae3ef/15485605035.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_off0000f0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E3 5376 bytes
SHA-256: ab5a39250c4757acfedad7bd75728768e3596e1f7aba8ff73bc083039739466f
font_01_sfnt_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 10556 bytes
SHA-256: 006b03d0541985ca5112849d339db5cb6fdf51f996c58ab7ce690339b42a16c8
font_02_sfnt_off00012703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12703 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c