Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd4ebbe26f19ff3…

MALICIOUS

PDF

93.2 KB Created: 2021-04-05 21:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f5b09ab821fedaa3915ec75ea58fce82 SHA-1: ad31ab399c094d6d60bffa2e056d65bf690c14ba SHA-256: ddd4ebbe26f19ff3a563454eda4f8bc3533ff4be8bca8338cb37049063d0134c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/123?utm_term=afl+fixtures+pdf PDF link annotation
    • https://cdn.sqhk.co/zarejesorufo/oU888L9/maiden_voyage_lead_sheet_bb.pdfIn PDF document text
    • https://cdn.sqhk.co/simunenij/ctjjoRd/love_tester_games_online_play_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/hbijhhp/aden_and_anais_stokke_sleepi_crib_sheet.pdfIn PDF document text
    • http://uscreditinquiry.info/when_can_i_book_disneyland_paris_2021w0k36.pdfIn PDF document text
    • http://purpless.vip/zimisaneramosatw4nye.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/hbibhgc/87528995614.pdfIn PDF document text
    • http://drnextact.xyz/car_parking_game_3d_for_pck0f5w.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/62615756612.pdfIn PDF document text
    • http://wonder-ita.fun/4108522155537kfm.pdfIn PDF document text
    • http://otshelnik.net/how_to_remove_the_front_panel_off_a_frigidaire_front_load_washercggxs.pdfIn PDF document text
    • https://cdn.sqhk.co/kebabefepu/dgfiiST/66698522845.pdfIn PDF document text
    • http://niwadeg.mywebcommunity.org/cyclical_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/kunawako/gfkOXnP/smart_light_bulb_color_changing.pdfIn PDF document text
    • http://julivojurukumu.sportsontheweb.net/limubusijuvamowukabevopu.pdfIn PDF document text
    • http://vodoroding.info/what_is_the_fear_of_yellow_things_calledel21n.pdfIn PDF document text
    • https://cdn.sqhk.co/xizefonuma/8jeFC7q/85709594886.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://s3.amazonaws.com/senodiw/knoxville_tva_employees_credit_union_saturday_hours.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/america_anglosassone.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/17485824069.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/18557040795.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/docket_sheets_erie_pa.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAB 6624 bytes
SHA-256: a663e56866fdc514478a06499653db33b63126ea470a89ef26753bfc3433c753
font_01_sfnt_off0000fe37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE37 4548 bytes
SHA-256: db8d331225227089d493e9df16c80ac106f30e44fa2d86f181b8f4ce5ace1663
font_02_sfnt_off00010db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB7 3232 bytes
SHA-256: 57abe2b4261768a5ca0d626a48a1094ba733be6454d58a56e2bdf4af01468c1e
font_03_sfnt_off00011b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B18 11088 bytes
SHA-256: d5979264878454dc48dcaf256f9d43c27c5c0436d414df36fcd9b0188edb32fc
font_04_sfnt_off0001410c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1410C 16256 bytes
SHA-256: 14c925df40e0ebbe82c85ded229192e09645d97a8b875bb657eea09ceaf41df9
font_05_sfnt_off00015689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15689 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230