Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ce302b2a027acb…

MALICIOUS

PDF

71.9 KB Created: 2021-03-01 16:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7c0277f81fd8dad39cc3c4c1247fd72d SHA-1: 51c0a93f1f074958e20edcab02ec631747cab465 SHA-256: 41ce302b2a027acba49c82089e3a164a7ea3ccad0b95b27c9848746c385d1a72
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

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
  • 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://nipisod.ru/123?utm_term=how+many+ar+points+are+junie+b+jones+books PDF link annotation
    • http://lomigakorak.getenjoyment.net/waxiduwawerarivupewa.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/what_is_an_example_of_iambic_meter.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/kioti_lk3054_repair_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/hgjjhiy/tank_stars_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/budatumibowu/bhegfKI/strangers_video_chat_app_download.pdfIn PDF document text
    • http://dejepuzalew.mygamesonline.org/kadixugusofisotasawine.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/ejchbgd/vasotajafesoje.pdfIn PDF document text
    • https://cdn.sqhk.co/sirojenu/ehcfhgR/mejokejugugewuj.pdfIn PDF document text
    • https://cdn.sqhk.co/bozomixega/jiRRChg/total_destruction_to_your_mind_santana.pdfIn PDF document text
    • https://cdn.sqhk.co/dujagazatad/fieEtje/hearthstone_corrupted_blood_deck.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/free_iphone_vocabulary_builder_apps.pdfIn PDF document text
    • http://topsalon.xyz/at_what_age_should_you_start_boxingwf30t.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/EhgqjiR/bf_movie_video_editor_online_free_download_apk.pdfIn PDF document text
    • http://biomaniix.website/raju_bhai_movie_hd_video_songsw6seo.pdfIn PDF document text
    • https://cdn.sqhk.co/naxiwakiwuv/hhiFheg/32488461707.pdfIn PDF document text
    • http://sks-expertiza.ru/jesevo51c7r.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/bazakodajesalojixiside.pdfIn PDF document text
    • http://re-capital.ru/61222525812wkx9f.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/jBjjRhZ/fimunojufotomebowete.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/gilidemoxuteponakusowifo.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_off0000da0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0B 5368 bytes
SHA-256: c98a936b8ab06f487a2f0c42df3f1979e5439eedb386ff30a4cc37bd6c4879f9
font_01_sfnt_off0000ec44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC44 10552 bytes
SHA-256: 4d08b9615f9eedfe0fb957c3e7b0a3c022646a5ca9f03c7065fad9cfd160dbc2

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