Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd500ab21f90ab3a…

MALICIOUS

PDF

87.3 KB Created: 2021-03-23 08:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 74032ab2b092c8cbd05dbe84a1e75787 SHA-1: 59313f214422465a490670c57048fe2e8349030b SHA-256: fd500ab21f90ab3a2d66962b7022a68b775ec528be19c221c90ac37495747e59
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://lozipotod.ru/wix?keyword=thermal+energy+transfer+study+guide PDF link annotation
    • http://sitizinudex.getenjoyment.net/contax_t2_battery_cover.pdfIn PDF document text
    • http://yewes.fun/stanley_2.8_wet_dry_vac_filtere4tz2.pdfIn PDF document text
    • http://xajoraxi.22web.org/zukupa.pdfIn PDF document text
    • http://esportzmlevent.com/wurotuvisijuxededutagomjuis.pdfIn PDF document text
    • http://zoneeuro.pro/man_myth_and_magic_an_illustrated_eniue5x.pdfIn PDF document text
    • http://dukafufuxona.iblogger.org/34253157700.pdfIn PDF document text
    • http://shop-onlain.fun/holt_mcdougal_united_states_history_beginnings_to_1877xipjt.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://uploads.strikinglycdn.com/files/21a83964-5c7e-4a9d-bd24-e81e916930cc/titiwugezazojotuzu.pdfIn PDF document text
    • http://faloboxodutak.epizy.com/92631544088.pdfIn PDF document text
    • http://bunalatar.rf.gd/77106593619.pdfIn PDF document text
    • http://vepilezora.epizy.com/damian_marley_medication_instrumental.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe0266b6-9cd3-4eba-92fe-481ba1d968a4/kunijulaporujuviredan.pdfIn PDF document text
    • http://suxazetevuzo.onlinewebshop.net/solved_quantitative_aptitude_questions.pdfIn PDF document text
    • http://wokoxut.epizy.com/casio_edifice_5041_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/313d728a-c777-491e-b511-316a112bbdbd/mcsa_official_study_guide.pdfIn PDF document text
    • http://podozedomusajor.epizy.com/sawuzozowijuwufib.pdfIn PDF document text
    • http://lejibunigazaxa.epizy.com/wadopipenutilelukoba.pdfIn PDF document text
    • http://tekubawo.epizy.com/atrial_fibrillation_guidelines.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97F 6440 bytes
SHA-256: 2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb
font_01_sfnt_off00010974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10974 5144 bytes
SHA-256: e5878320dffdb949cefcaa346b63f4f9336cec2bf12876ae558a358983473169
font_02_sfnt_off00011ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC4 11228 bytes
SHA-256: 5955349959339411b271715882b5bea66ff416ab45c93790c3106e7fbf09b98c
font_03_sfnt_off00014114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14114 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c