Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b16073dfb7ed94…

MALICIOUS

PDF

81.0 KB Created: 2021-03-19 13:56:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 52dd011efed6871b9149809afe816954 SHA-1: a9bc928a3459151ab4c923c8e38e26fec8422424 SHA-256: 14b16073dfb7ed94e50eb798ef2cc6f6d2e212b63198500fc6d2304b1ef7fece
156 Risk Score

Malware Insights

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

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 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://golowaki.ru/award?keyword=bsc+2nd+year+chemistry+syllabus+2020+pdf PDF link annotation
    • http://bazunujovi.scienceontheweb.net/trutech_under_cabinet_tv_dvd_combo.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/ghiFjgS/62325468970.pdfIn PDF document text
    • https://cdn.sqhk.co/muvifisi/eIjcZje/vimeo_video_er_iphone.pdfIn PDF document text
    • http://volalagokiva.sportsontheweb.net/basic_brain_anatomy.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/tragedy_of_the_commons_hardin_solution.pdfIn PDF document text
    • https://cdn.sqhk.co/gukawaki/icAheXj/nivoxi.pdfIn PDF document text
    • http://razadugufuto.22web.org/lowest_cost_of_living_cities_in_the_world.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://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_1c4abfdd48f14605a070b21f6be4063c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/goflex_home_lost_password.pdfIn PDF document text
    • http://wawugodeti.epizy.com/tixakizufemudamipubixad.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_afff33de9e7d424dabf39d24928dd0c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/new_army_dress_uniform_wear_date.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/puzopuwidajarunixabawala.pdfIn PDF document text
    • http://pojozija.onlinewebshop.net/how_to_connect_your_directv_dvr_to_the_internet.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/why_is_my_space_heater_blowing_cold_air.pdfIn PDF document text
    • http://munakazoxan.epizy.com/airport_city_hacks_android.pdfIn PDF document text
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_d1194422d21f436aadca2601f777fad0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/jodup.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/bissell_proheat_2x_revolution_pet_pro_carpet_cleaner_costco_price.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/85760293212.pdfIn PDF document text
    • http://sosozodazu.epizy.com/91166468215.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_8f8ced83e72a44cb9ecaac416434c35e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/23593464126.pdfIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_208319b8706a41d78462b3c7ef3dfa77.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/will_i_die_today.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_off0000f097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF097 5732 bytes
SHA-256: 44e0b2e19121c8cf90af1b29e4621b0c37436d03bb98e6e3af7426d58251747a
font_01_sfnt_off000103e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 10664 bytes
SHA-256: 59efceb150acee051a60dcabf6b7de8aa4430b124f6113a90ac113f41f3ff28e
font_02_sfnt_off00012826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12826 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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