Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a30082031d4264…

MALICIOUS

PDF

73.6 KB Created: 2021-04-05 00:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 86075436305aa8e979c55873fc9273a2 SHA-1: 3fc724963ff761bd3cd90c90d63c082c9d6e39ad SHA-256: 75a30082031d426471f3eab8bf3c70bef728a2760eb5c5d9a98b9af42c1d5911
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=dnd+5e+bat PDF link annotation
    • http://dommasters.site/how_to_cook_a_brined_turkey_from_trader_joesu9wgw.pdfIn PDF document text
    • http://usesol.xyz/obd2_mini_elm327_wifi_interface_adapterknchz.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/wasosobigomexujafo.pdfIn PDF document text
    • http://circulshtangcalip.website/vivojixoxekozibimipuxe1eo.pdfIn PDF document text
    • http://kisizifavo.getenjoyment.net/10590733324.pdfIn PDF document text
    • http://fherixq.com/loi_de_boyle_mariotte_exercice84cgk.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/mcts_guide_to_microsoft_windows_7.pdfIn PDF document text
    • http://dronextactical.xyz/what_does_the_red_light_mean_on_irobotym5lm.pdfIn PDF document text
    • http://sellforce.ru/bluefish_editor_tutorialf1uig.pdfIn PDF document text
    • http://tesocoin.online/543007085490h9q4.pdfIn PDF document text
    • http://luvozoredola.iblogger.org/acute_rheumatic_fever_guidelines.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://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_6fe7872c7aa443b98bb83c8bb2c3a9cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/40633b39-0a79-4804-982c-6226debf0fda/1992_polaris_trail_boss_250_4x4_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a57bb3-bcc6-42cf-b2f7-b504c6981c26/elementary_statistics_triola_12th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c334558-61e4-4250-b804-66eafbfbe174/how_much_weight_does_the_total_gym_hold.pdfIn PDF document text
    • http://jefesuzi.epizy.com/13602978801.pdfIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_af9961a080e9406589492ab5f9e17bb5.pdf?index=trueIn PDF document text
    • http://piwolimosopobu.myartsonline.com/dewiko.pdfIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_f56a2b87440a4837a8c59b8a0e4b5cc2.pdf?index=trueIn PDF document text
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_b74a6f616fba4f1ebf7ee82117e8afa1.pdf?index=trueIn PDF document text
    • https://eed7fa7e-4f31-4ba6-8269-e73f07ac74c5.filesusr.com/ugd/93374d_09952efc0576473291cc4e8f5953f9ad.pdf?index=trueIn 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_off0000d609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD609 4408 bytes
SHA-256: 047b361e3809fec7e087b840a00fca6867f5de279254834210b48d0332998072
font_01_sfnt_off0000e505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE505 10820 bytes
SHA-256: 5d888b0398daa13b93dd1dd8e865f6d97fff6d1e955b8500cd0e73b8987eeccd
font_02_sfnt_off000109c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c