Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd9369c7200c58e…

MALICIOUS

PDF

84.4 KB Created: 2021-03-05 05:15:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: de267f52ec9472027a892dd2ac1dfeca SHA-1: bc4095898b1b14b3403c4c15baf421b3829f9996 SHA-256: 1fd9369c7200c58e23db31f5dcd263b40c7df27c8e8bec88aa4cc6cf6ebbc834
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable domains, and one specific URL is used as a lure for a product manual. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/strik?utm_term=hoover+windtunnel+max+paws+manual PDF link annotation
    • http://p-kavkaza.ru/tufimavipewuxulukagovanwmub.pdfIn PDF document text
    • http://003-center.ru/742293272099fiwm.pdfIn PDF document text
    • http://jumpfs.space/notepad_compare_two_files_plugin6vtzd.pdfIn PDF document text
    • http://narewenu.22web.org/military_athlete_sfas_prep_guide.pdfIn PDF document text
    • http://community-day.ru/house_paint_colors_exterior_ranch_styleewfnv.pdfIn PDF document text
    • http://m-ryanaf.site/classic_arcade_games_online_donkey_kongdjhvw.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://uploads.strikinglycdn.com/files/e1b6248c-00cf-4315-9054-4bf0cdf82cd7/16466152062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cf5d85f-651b-4520-9234-014a63317d8a/what_is_carvel_icing_made_of.pdfIn PDF document text
    • http://nidakolitax.epizy.com/84696981540.pdfIn PDF document text
    • http://fisazivibutaz.epizy.com/89152794276.pdfIn PDF document text
    • http://tokilofi.rf.gd/lelapoboguwe.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/memoluzarapunuxabifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401dee9c-80a8-4451-958c-458e93fbd3f6/jalaxorudolubusoduk.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/online_hotstar_video_er_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/lawufedikuzunotaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de059b8b-7128-43ec-965e-33b5f52d0aa5/65492179190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b42fe3-3a27-4ac9-a703-3b524ea6636e/quais_so_os_tipos_de_linguagem_na_filosofia.pdfIn PDF document text
    • http://raxabavanuwirig.rf.gd/bombay_movie_songs_free_masstamilan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b4585ba-279d-4225-9436-5d595008ac12/spacemaker_xl1800_does_not_heat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/960e10bf-8ecb-4250-b1b7-6b94a3e104d5/remington_700_sps_tactical_distance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a72a9499-9d49-4745-9fb5-1d9243ddbe35/dominos_style_pizza_recipe_without_yeast.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/wcab_stipulation_and_order_form.pdfIn PDF document text
    • http://pumejusatojajeg.rf.gd/sedation_in_critical_care_guidelines.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_off0000ff81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF81 5168 bytes
SHA-256: 6e232f5bf99800cf086fd5a195766b347874ab45ddcd66ab65fac6b8390a480d
font_01_sfnt_off00011106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11106 10664 bytes
SHA-256: 4098c53764ce3c6906a9b778005dc6f75ba69c7c93ae01d2d8fcdc534e0c69e7
font_02_sfnt_off0001347a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333