Malicious PDF — malware analysis report

Static analysis result for SHA-256 45cd0c468060110c…

MALICIOUS

PDF

80.3 KB Created: 2021-04-17 06:17:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e17d34a51ffbb7455cd232b549c527be SHA-1: 6a9a23b7cd43d47e46012c6d9c5921f1c34a20d9 SHA-256: 45cd0c468060110c391f390d0d10f067ba659a6df962a507a5912182864f3675
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' containing 26 links. The primary external URI points to 'https://ponafet.ru/strik?utm_term=vivint+ac+thermostat+manual', suggesting a lure to a phishing or spam site disguised as a manual. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the structure and linked URLs indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=vivint+ac+thermostat+manual
    • http://mukinumatonewo.getenjoyment.net/geomorphology_notes_for_ias.pdf
    • http://tujukesabegakom.mygamesonline.org/dusupibogafobamobokil.pdf
    • http://vixegoxufareka.getenjoyment.net/apollo_munich_optima_restore_wording.pdf
    • http://dunodipike.sportsontheweb.net/cambodian_alphabet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://soranodabiwegi.myartsonline.com/pdf_to_word_ocr_software.pdf
    • https://s3.amazonaws.com/xozeb/70863979434.pdf
    • http://kesolimasakifi.myartsonline.com/kotonedobuwob.pdf
    • http://jatoxat.atwebpages.com/addison_wesley_math_makes_sense_8.pdf
    • https://uploads.strikinglycdn.com/files/fd78bbce-4ed9-4b11-bc52-d53b7f18af26/volume_of_cuboids_slideshare.pdf
    • http://mogixos.atwebpages.com/20917222372.pdf
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_eb0850cc50ad435abd83928f8cc4845f.pdf?index=true
    • https://s3.amazonaws.com/jimugivos/muzazivawop.pdf
    • https://uploads.strikinglycdn.com/files/0fd8f039-7e9e-4ab4-8aab-cbcbac64a6ef/positive_psychology_exercises_3_good_things.pdf
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_ad352390f09b41cebfd83c860ef2e5f6.pdf?index=true
    • https://s3.amazonaws.com/marimejerebo/the_wolf_of_wall_street_full_movie_in_hindi_google_docs.pdf
    • https://uploads.strikinglycdn.com/files/162c7a26-1391-4d10-a3b2-329e68bbd975/chicago_style_paper_margins.pdf
    • https://uploads.strikinglycdn.com/files/3f28ffb9-cd21-401e-acba-9c4060a52162/what_are_considered_acts_of_terrorism.pdf
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_cc301e4d0aa84a94ad77811311021fec.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9e7f0dca-00f9-48b5-854f-065d81719b59/the_heirs_episode_18_dailymotion.pdf
    • https://uploads.strikinglycdn.com/files/23c09c37-8b9b-4d0c-83b2-f31b3eb51c21/97175820650.pdf
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_a0dae57bce3b47e69cc92419ee179c73.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b4752fc8-9499-482c-8347-e9e691d54192/warriors_of_chaos_army_book_8th_edition.pdf
    • https://uploads.strikinglycdn.com/files/ccc68624-1af9-4304-9e8b-b70085540015/napusada.pdf
    • https://s3.amazonaws.com/sesijesule/flash_actionscript_3._0_templates_free.pdf
    • https://uploads.strikinglycdn.com/files/b2332202-9e9b-432d-b659-7ff9b30a23f3/wedunelu.pdf
    • https://369206df-e466-4f8f-9771-850d1edb33c5.filesusr.com/ugd/8fd5dc_1ad507aebbc04b78bf2e98e37ce9feaf.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_off0000fa7d.bin
45561c69c07cfaac87e010f295593cae68a5dbf98b7f1aec0e5a4ef8335affb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 5064 bytes
font_01_sfnt_off00010b94.bin
5d1037aacf05ad454275b78dd691090b7bfa206eae1627652a929f96361fc728		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B94 11400 bytes

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