Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ef49ed4e99fade…

MALICIOUS

PDF

80.9 KB Created: 2021-03-14 21:50:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42240f401a5715531986edbd0f75a320 SHA-1: 341a511e6806f5ae50a615719fa4af10b2a8b2dd SHA-256: 07ef49ed4e99fade8a67ba23a10e9b9cca8c07d31340e6eb30338a6fb4739011
156 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a large number of external links, suggesting a link farm or phishing attempt. The embedded URL and the document body text, though corrupted, hint at a lure related to 'The Silence of the Lambs sequel order'. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=the+silence+of+the+lambs+sequel+order
    • https://mufanujirube.weebly.com/uploads/1/3/5/3/135348440/7080107.pdf
    • http://gipovasota.sportsontheweb.net/miwesevexolebojiwodo.pdf
    • https://tuberosaguxe.weebly.com/uploads/1/3/1/4/131437792/8350976.pdf
    • http://roselosudeve.sportsontheweb.net/where_to_donate_fishing_equipment.pdf
    • http://tusiteguluvora.getenjoyment.net/what_are_the_8_principles_of_the_data_protection_act_bbc_bitesize.pdf
    • https://kobirozo.weebly.com/uploads/1/3/4/8/134846370/nekupogiga_raduzimuxapix_jevodafi.pdf
    • https://basavorulifa.weebly.com/uploads/1/3/4/8/134899730/8105303.pdf
    • http://punavuvipufov.sportsontheweb.net/common_core_standards_california_ela_7th_grade.pdf
    • http://rosutob.getenjoyment.net/how_to_end_a_rental_agreement.pdf
    • https://jumufewaxijakuk.weebly.com/uploads/1/3/1/3/131380308/zikuzasegidepal_guvurogiwen_bekel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5b3500e9-40b4-440a-9ada-171ed8bcf4c9.filesusr.com/ugd/7820d0_284e138b0b214ebfbf619f8dacb732ab.pdf?index=true
    • https://s3.amazonaws.com/fifuto/52329955712.pdf
    • https://uploads.strikinglycdn.com/files/6708c5c1-d575-4db8-adba-c68b463ffb62/81034252886.pdf
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_e444723991b947c297098d93f13571c6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9c5737f5-c6d5-4f73-ac6b-358603737924/nextbook_windows_8.1_tablet_hard_reset.pdf
    • https://s3.amazonaws.com/dekogamik/all_barbell_exercises.pdf
    • https://s3.amazonaws.com/jebokizez/pinyin_pronunciation_chart.pdf
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_4b396591353a4cd8a72f0cc2e0ad6564.pdf?index=true
    • https://uploads.strikinglycdn.com/files/827660f8-8755-4747-b441-b4249bfc8fda/american_sayings_origins.pdf
    • https://0dd0cd87-80d3-4eb5-b9c6-73c43c3a6fca.filesusr.com/ugd/f0b6b3_6610a27e771348908a3260468ca616b7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/267976d8-a320-4cab-a833-00c2dae66b44/vetidetop.pdf
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_37ee27d421c04ca58ad30469417c8d3a.pdf?index=true
    • https://s3.amazonaws.com/gapivegek/49670500283.pdf
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_5b8732ba0ac04bdda17fe80803aedaa6.pdf?index=true
    • https://s3.amazonaws.com/tadevewuju/1730433425.pdf
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_8ea727aec16e48fab49f62567a5ba25a.pdf?index=true
    • https://ebc1add8-0b9d-418e-9e4a-1e287827e933.filesusr.com/ugd/ab63e3_d14b0adc0c904ceeac85e578b1f4e282.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1e7e4272-1f32-426a-bbe8-dcc53a738eec/verbos_en_ingles_traducidos_al_espaol_y_su_pronunciacion.pdf
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_fc335616bf41471686861cac9e470f8c.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc22.bin
d405aabe239461a6bd5ea8a6d7d513fa54d23195df4e4b31a446c1278f84d64a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC22 5476 bytes
font_01_sfnt_off00010e91.bin
c9a5070d88e697bc3e5034fdf12f37688b88fef6908b40d2e42b534bb4ae2d7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E91 11584 bytes

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