Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa242340e0c878a1…

MALICIOUS

PDF

89.0 KB Created: 2021-03-31 03:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 804ca3dcb322ab259fc031ec0866db2c SHA-1: f29eeb9aa85ccd19e0b749533e3cc4467677e5a0 SHA-256: fa242340e0c878a12c4d085fca35ab090fe000bfc943d085ada81dea539dacc1
166 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document's content is designed to trick users into believing there are issues with financial transactions, a common phishing tactic. The presence of external URIs and link farm characteristics further supports a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://mezovuduw.ru/strik?utm_term=fix+corrupted+ntuser.dat PDF link annotation
    • https://cdn.sqhk.co/vixokezafafu/chfqigU/unless_exercises_with_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/jezuleku/hjhjk7x/tower_color_online.pdfIn PDF document text
    • http://kodepovorivapi.mygamesonline.org/journal_about_teaching_english_for_young_learners.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/jchjjUa/house_music_radio_stations_nj.pdfIn PDF document text
    • http://xitodefigatefuj.medianewsonline.com/xolobite.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/buscopan_comprimido_bula.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/E6hetaG/air_control_lite_app.pdfIn PDF document text
    • https://cdn.sqhk.co/vunalogivefu/giagiRl/free_online_able_invitations.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/html_link_to_new_window.pdfIn PDF document text
    • http://kogowetek.getenjoyment.net/54722334330.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/wunorowe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa4334a-c4d1-475b-ae26-d00ce6aef42b/25303578912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d046915-5f5c-4280-b139-224d60fd8663/1001_jazz_licks_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0cfdf4-ac1d-4520-a9d4-88e600a8c6b9/how_to_know_if_there_is_acid_rain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49670d0-b6e2-4323-9e97-beb19786af6b/what_are_the_four_types_of_writing_in_the_old_testament.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07e0f9a6-b180-4a22-af60-8397eb238e9b/75585375848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15f7742f-6a44-4da2-85d9-b9ed6b0b611e/legit_ways_to_make_money_from_home_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a839e681-7496-4399-89f7-3284749fcf34/metal_gear_solid_5_gameplay_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c7d00a-86d1-4cc7-8b08-1e7d2be27d9a/6199109678.pdfIn PDF document text
    • http://suwuriru.onlinewebshop.net/bratstvo_crnog_bodea_18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece01ccd-9915-414a-a3ac-06a32dc8b5db/garexanelibifegewonivi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001080c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080C 5092 bytes
SHA-256: a58f337a3938e06d8783e127d975107c74f6254bc993238757de3063b7c82595
font_01_sfnt_off00011979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11979 11064 bytes
SHA-256: 36928184a26c54d2b1ad58d9a3f3eb68a2a97f224d92311e012e93570b3cd147
font_02_sfnt_off00013f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7E 16140 bytes
SHA-256: 2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3