Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc03294f7ebd9fd…

MALICIOUS

PDF

78.1 KB Created: 2021-02-17 18:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 8d54466ef3effdd42b5ef2f191905eba SHA-1: 97d1748981291ab5b53e1c4e9b59a77d2e42e739 SHA-256: bbc03294f7ebd9fdcbc6969000d910dfe5be5b2cb4d97495f26b3bce19336217
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains text related to game guides, suggesting a lure to attract users to click on the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=cataclysm+balance+druid+pvp+guide In PDF document text
    • https://cdn.sqhk.co/gupetipek/dicxFii/mirror_workout_stock.pdfIn PDF document text
    • http://prizinsta24.site/bafelenijipiwirakunahgqlj.pdfIn PDF document text
    • http://legendbilisim.com/acetic_acid_forms_dimer_in_vapour_phasedp1n7.pdfIn PDF document text
    • http://fakaripeti.xyz/pokmon_diamond_and_pearl_adventure_volume_1_read_online_freeb0pfd.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/dgdFGjc/twitty_preschool_kindergarten_learning_games_se.pdfIn PDF document text
    • http://future-techno.ru/baxesovijesolokapopw7so2.pdfIn PDF document text
    • https://cdn.sqhk.co/tumupowe/Ejei5gd/steven_games_piano_tiles_online.pdfIn PDF document text
    • http://legionmone.xyz/53417687740ppea5.pdfIn PDF document text
    • http://center-san.ru/f1_2016_ps4_2_player_offlineyy0im.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/AjfoENx/cadena_100_lista_2019_youtube.pdfIn PDF document text
    • http://dutov.org/railway_aptitude_test_book_freezn4jg.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/bhihayU/pick_me_up_taxi_idaho_falls.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/widofafane/mekafedisugabagodo.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/48242555488.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/animal_crossing_character_guide_new_leaf.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B6 5600 bytes
SHA-256: b87275aeb35f8477ba2377adfc7ccdf3a70edde28ae0ac651db02e43cc5d40ad
font_01_sfnt_off000107af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AF 10584 bytes
SHA-256: e80cbeb0245bfc622def3aaf9600906671908c2478a56671f497c6faac20bbfa

Open this report in the interactive analyzer, or submit your own file for analysis.