Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a58e258d122548a…

MALICIOUS

PDF

86.5 KB Created: 2021-04-06 10:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0486e90370b10e7220f56d64c1cb6d77 SHA-1: a913f594888bb5a54315c5150758bf2e25f57fe6 SHA-256: 8a58e258d122548a63024a309d3f6625bc5b9bbeb9bfc41bd8b4e4cdecb3564e
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body references 'Netflix aplicativo android', suggesting a lure to trick users into clicking embedded links. The presence of numerous external URIs, including a link farm on disposable hosting, strongly suggests this PDF is designed to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xajibur.ru/123?utm_term=netflix+aplicativo+android PDF link annotation
    • http://zevupixikug.mywebcommunity.org/sifudaralevadedofabetamar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490930/normal_6067f714979e4.pdfIn PDF document text
    • http://sojurufo.iblogger.org/why_is_my_toaster_oven_not_working.pdfIn PDF document text
    • http://lozuzaragujeb.mypressonline.com/irrigation_engineering_by_rk_sharma_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447877/normal_5fccf08a6f30b.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/Z3RNrib/vuvenegenumarenelelun.pdfIn PDF document text
    • http://wavoximebipota.iblogger.org/88907087328.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/hhcginw/kikunadezomojuxujogopel.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/fjbKFo6/switzerland_coronavirus_lockdown_exit.pdfIn PDF document text
    • http://xuvivok.22web.org/effortless_mastery_liberating_the_musician_within.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404133/normal_6004bf1b70f1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_603e9de45df2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476011/normal_601f6abc859ca.pdfIn PDF document text
    • http://sugoxebojun.getenjoyment.net/naive_bayesian_classification_in_data_mining.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jetelusaxidu.epizy.com/16988166061.pdfIn PDF document text
    • http://jokokisenekal.epizy.com/bedip.pdfIn PDF document text
    • http://gusabonatixuk.rf.gd/bonogozosiledegafozu.pdfIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/around_the_world_in_80_days_bangla_download.pdfIn PDF document text
    • http://musifibadew.rf.gd/is_trs_a_good_retirement_plan.pdfIn PDF document text
    • http://rixuroruwe.myartsonline.com/51980439955.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DC 5068 bytes
SHA-256: 2e3996c60c68762c6e183d6c24b182d000acf70c45947246e39f350a5f4d57cb
font_01_sfnt_off0000fb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB36 1964 bytes
SHA-256: a1790f282d3844ca3286807c5f05c15de1d1247b34c91ca45da6f06341c3dacf
font_02_sfnt_off00010443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10443 19540 bytes
SHA-256: 3bfd200210448799631fd107df2ff31a4697695ec357a1ae3531b17886c1798f
font_03_sfnt_off000132e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E5 16912 bytes
SHA-256: 3ac958a680a9c3594433849186ee462ea6ea5a7414a777510a424d58ee78a1a0

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