Malicious PDF — malware analysis report

Static analysis result for SHA-256 822c523963271338…

MALICIOUS

PDF

78.1 KB Created: 2021-03-15 20:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d00ecf29d4b6bc78cdc42a5230b9690 SHA-1: 7596151cd765ae1eccfaa8454a9756f1e8ebdc1e SHA-256: 822c5239632713386c5ce37b04090925890003494d9b75001d0144b5112629bf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a critical heuristic identifying a link farm designed to direct users to potentially harmful sites. The presence of embedded URLs and the PDF structure suggest an attempt to exploit users by redirecting them to phishing or malware-hosting domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/award?keyword=kaleshwaram+project+pdf
    • http://oneshops.space/glute_hypertrophy_program_robin_gallant3cctg.pdf
    • http://nedopivele.22web.org/calories_in_10_dunkin_donuts_munchkins.pdf
    • https://ligexuvuzi.weebly.com/uploads/1/3/0/8/130814340/rumab-totobisivatiwos.pdf
    • http://pubguckazan.com/the_confessions_of_st_augustine_book_3_summary3ih8r.pdf
    • http://resesovazumo.iblogger.org/vonofevesit.pdf
    • http://uablog.website/lodepalcvuki.pdf
    • https://dinabowufijub.weebly.com/uploads/1/3/4/7/134751612/xubugo_kezunag_tibuzog_xapas.pdf
    • http://bonus332.site/bodomixofefezebe73et.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_b311297106154e18ba385b86ddaaf776.pdf?index=true
    • https://6c49ff76-e13b-46da-8354-2e633d56f736.filesusr.com/ugd/211c2d_9af49dbd92c146a7a62164fb1077e99d.pdf?index=true
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_768b3e1f4e1b4b139c426ef8934a5880.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e5ca87be-3bd5-40e6-9ea9-fcae41f0ede6/times_table_exercises.pdf
    • https://7e079b21-6cfc-4bbc-a8af-001f4930a7f2.filesusr.com/ugd/f66805_c580f43b331f462a9583090d08eb530a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2d590577-23b6-4178-946c-dab7b6913045/45841168.pdf
    • https://uploads.strikinglycdn.com/files/06eda9db-1011-45f9-b9b4-dbbc82804e79/28200725136.pdf
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_c8f59b4682a946f0b18aa87b8ee9651e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c00fb50e-559d-4775-8132-f93a705ddffc/steve_harvey_books_online.pdf
    • http://femejedad.epizy.com/identifying_hundreds_tens_and_ones_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/d338c04d-dd2b-4d69-b28e-d42055748531/tulib.pdf
    • https://uploads.strikinglycdn.com/files/4a7a8c07-ab58-41b1-9943-5067b768419b/star_wars_jedi_academy_book_2.pdf
    • https://uploads.strikinglycdn.com/files/bbac43d1-5b25-43a3-9a5b-d040becdb1cb/16641195113.pdf
    • https://uploads.strikinglycdn.com/files/8c975787-b5ff-43b3-af00-5644a6fe65d2/what_is_the_acceptance_rate_for_the_air_force_academy.pdf
    • https://uploads.strikinglycdn.com/files/4033c05d-fda4-4830-9899-875b3b504aa3/bose_wave_radio_remote_battery_size.pdf
    • 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_off0000f321.bin
50221ceeefa0487bbe2e139ae1881b4a371edf6e06b64eb8045afe9205a5e238		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF321 5532 bytes
font_01_sfnt_off000105e0.bin
8c7e7aa6213fbc7047338f0c94f565c1a2309ad02126ef8beb30ddd35b48aeb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105E0 10984 bytes

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