Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ccad00f22894b18…

MALICIOUS

PDF

83.0 KB Created: 2021-05-15 09:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 17928cfb93214addf119746b27f09625 SHA-1: 1594d74f3917df48170362a23e3790fa05317ad2 SHA-256: 4ccad00f22894b18a1cdd91eb0afc3d9aaa935627c32bf4b57d58d4a7953f594
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9967

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/strik?utm_term=how+do+you+fix+a+bluetooth+speaker+that+won%2527t+charge PDF link annotation
    • https://cdn.sqhk.co/kizulajeli/yjeAxyC/gudakimeliwuleluluziz.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/gjWheAh/duck_duck_goose_board_game_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/gXifiei/4835729698.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/fhghi4V/las_vegas_casino_hotel_deals.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/tgfdhdD/rescission_agreement_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/00a02902-37d3-4ffb-af3f-f7467b15bca0/how_to_adjust_time_on_my_g_shock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/693f2ff1-8d9d-49e9-a92c-afb902494514/how_does_omron_wrist_blood_pressure_monitor_work.pdfIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_86842aab8a3e4e94b272607ed09a5ee6.pdf?index=trueIn PDF document text
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_222ea6efe4064e26b2cb7a38cf79cab0.pdf?index=trueIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_09bea685875447f889fdc6f0d407b197.pdf?index=trueIn PDF document text
    • https://e9155d39-0f7d-4366-9ee8-34e17fe3d773.filesusr.com/ugd/9e05b8_4a5833ba065a4f53b789fdd3d1dbe48a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb4d42f-6f07-4780-945b-4dfbe099d6e6/what_is_the_job_role_of_customer_service_associate.pdfIn PDF document text
    • https://6438efa2-cbc3-4905-bec7-85cdafd94a34.filesusr.com/ugd/d1cf8b_774f5f5b7ce343f3a15154c94e812db2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c063d2-e26e-49bf-b0f9-1dc429b1b4de/dell_u2415_no_dp_cable_hdmi.pdfIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_e8a6a391e126448da7f01fd54852ff1b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f49bd39-0e36-4dfc-8f68-7e353259459c/jidugavabufibatuzexan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97524bf7-30c4-40db-9d36-00e5f0a98936/corporate_social_responsibility_examples_in_malaysia.pdfIn PDF document text
    • https://a819be37-316e-4347-83bc-b067fb6953c8.filesusr.com/ugd/d5662a_c8d5b7f0cb194d0eaa5013d1f09ae941.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8906a42-31f1-46f4-aa49-9a0756b6ff58/94628985243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25c3dd18-d7ee-4c21-aeb4-8f14ea12dde6/how_to_check_if_battery_is_charging_on_hp_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ae19c6d-2f30-4dbc-9553-ec48ac0ab969/denon_avr-1911_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a7b3c71-8092-446e-99cb-a0c9368f4b93/6667837431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fe32c05-b753-4eb8-b03f-f0448cd8eb30/how_to_fix_a_tablet_that_wont_charge.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_2055b9ee2ad74396baa1ae60046a469a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/911c51c4-5d4e-4d97-8c05-105b28fdee63/89479726821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d17e2721-59ae-4fe4-81e5-9c1e477018db/what_is_a_5.0_mercruiser_engine.pdfIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_f37d3ef3850f4eceb980c1b6965e9da3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ae3a53-9c15-4a5d-bc82-01f7cb62d5ff/48391167993.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_off000103d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D0 5880 bytes
SHA-256: 5ba5a194adfca43680ab46ceac1d85cea093dfade9201b44028c8dc4bb7bf3a8
font_01_sfnt_off000117ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117ED 11180 bytes
SHA-256: 6189ee4d395062e7e4f7b5878323e4d22ad562609beb8ce8052e5f773536dc3f

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