Malicious PDF — malware analysis report

Static analysis result for SHA-256 976edbcbfeef217a…

MALICIOUS

PDF

84.8 KB Created: 2021-03-11 18:16:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8b05b886112932fb0ca479f3022511b7 SHA-1: 4958e5e4d38aae57b8a4460cc7b2333bc78c099f SHA-256: 976edbcbfeef217a281b8e49c738c9ab69bbe21987382d0fb9821d3c58a6cec7
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs pointing to various domains, suggesting a link farm or redirection mechanism. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates these links are likely part of a phishing or malware distribution campaign. No scripts were extracted, but the presence of external links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://fokemale.ru/award?keyword=carbonate+reservoir+characterization+a+geologic+engineering+analysis+pdf PDF link annotation
    • http://zumepaposakuf.scienceontheweb.net/54854888933.pdfIn PDF document text
    • http://wudaxozibutix.sportsontheweb.net/puwutapixaj.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/74720246470.pdfIn PDF document text
    • http://kifisafobubupo.mygamesonline.org/what_are_some_irish_instruments.pdfIn PDF document text
    • https://pukuxenusafo.weebly.com/uploads/1/3/4/7/134711282/5459473.pdfIn PDF document text
    • http://jonotijero.medianewsonline.com/sennheiser_rs_175_wireless_headphones_reviews.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/craftsman_5_hp_chipper_shredder_manual.pdfIn PDF document text
    • https://dubiriji.weebly.com/uploads/1/3/1/4/131406762/9063123.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/best_typography_design_projects.pdfIn PDF document text
    • http://sotipidikukunow.getenjoyment.net/mesasatamarubebidikutezo.pdfIn PDF document text
    • https://wenutezow.weebly.com/uploads/1/3/5/4/135400756/759323.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
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/39498ee0-4d6f-456f-99f4-f3c181a5c317/78155387149.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/kaleshwaram_lift_irrigation_project_map.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/facebook_app_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/bokijitibofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4bf4eee-277e-448b-836e-0e8472dd7e42/terupesisidisemu.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/master_cleanse_file.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/how_do_i_turn_off_demo_mode_on_my_sony_xperia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3c7ae3f-9ef0-4731-87bc-881b5bf087d4/58798741829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef7bd72f-dce6-4a06-bc0e-e7156dd95101/niroxedera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/338bff9f-68d2-48c4-b14a-8792890d604c/acer_aspire_v5_571_laptop_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f631af2e-4a2b-43ca-af68-0387d2dacf0b/boy_scout_reading_merit_badge_pamphlet.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/bissell_powerlifter_powerbrush_how_to_use.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/kewukebaludadowemejubasuw.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE064 5580 bytes
SHA-256: a874e37c3c557a8016fbe7c3e2d1d28c0d707419606b998918496e80017ffcb6
font_01_sfnt_off0000f368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF368 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off0000fec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC9 9936 bytes
SHA-256: 5f8a43b8900ebc5df5e6eac14191dd56a837de52ba75bbc1d89b8b5105457fe8
font_03_sfnt_off000120f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F5 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
font_04_sfnt_off00012ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF5 5780 bytes
SHA-256: 201c300f5e2207a7981c2a8b22f49b61dcd2921241aea7d686c6089fb9d4cfa5