Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eaeaea77771316d…

MALICIOUS

PDF

78.1 KB Created: 2021-03-12 19:51:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6822ddefee333c82556ec539a462ae27 SHA-1: af821b854b190a021ad70fe5fe6cf350c85f631b SHA-256: 7eaeaea77771316d4140e6fae4d8718ac6daf69bbe11e53ac7a43f9f304edfed
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 0.9995

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://crophysi.ru/award?keyword=application+of+functions+in+real+life+pdf PDF link annotation
    • http://balenagawovu.22web.org/half_broke_horses_summary_chapter_6.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekogi/jd3djgK/context_clues_reading_for_meaning_answers.pdfIn PDF document text
    • http://kuzojud.66ghz.com/how_do_i_reset_my_whirlpool_gold_quiet_partner_iv.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwifoviwalo/mjeJgjx/lifeafter_resident_evil.pdfIn PDF document text
    • http://foxiwirilavisan.22web.org/37820027914.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/zeraxib.pdfIn PDF document text
    • http://tukazijib.22web.org/60378564585.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/5bUF1hb/64301491643.pdfIn PDF document text
    • http://zokixofevuku.22web.org/automation_engineer_interview_questions.pdfIn PDF document text
    • http://wolorafo.22web.org/python_3._4_for_windows_xp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixipidulateva.rf.gd/pelicula_cien_aos_de_soledad_en_espaol.pdfIn PDF document text
    • http://gebibem.epizy.com/st_alphonsa_biography.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_b70faa7d2dfc4662b7e7a17f6000d525.pdf?index=trueIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_36fd41240ead414e804f78c29dd81600.pdf?index=trueIn PDF document text
    • http://zofutigo.epizy.com/schwerbehindertenausweis_beantragen_nrw.pdfIn PDF document text
    • http://melewurimepuja.rf.gd/what_is_the_fifth_wave_rated.pdfIn PDF document text
    • https://d7179dab-c972-4501-9f4a-16044ca71e84.filesusr.com/ugd/434f74_e46b5114a17f4da1bee84971b129129c.pdf?index=trueIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_05f663a5085b418fa564ebf1b57a3090.pdf?index=trueIn PDF document text
    • https://0f7a2101-273c-4f7f-b1fd-079d1ad923c1.filesusr.com/ugd/a7ea6f_690ef151aced405988ac2bef1b79cbcd.pdf?index=trueIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_9fd288e5add34bc5b8e5de4ab1f0bf8c.pdf?index=trueIn PDF document text
    • http://bolumopip.rf.gd/sda_pathfinder_classes.pdfIn PDF document text
    • http://rujemivegelap.epizy.com/borg_breathlessness_scale.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_off0000eac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 5140 bytes
SHA-256: 03af14a58d605c21c0863bcf55d36060f1379c890e958bf698a5c5e84b0d17b2
font_01_sfnt_off0000fc47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC47 1880 bytes
SHA-256: 966106b28ae8f1330d826459814e5055f6d81c3513c9841a50410ef819790710
font_02_sfnt_off0001055e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1055E 10812 bytes
SHA-256: 3be5f03bfd3f511c99a481bde96dc4ba426a9a124b7ad6f78d08b72dc5d77ecd

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