Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f343b21a3e65dbf…

MALICIOUS

PDF

80.0 KB Created: 2021-04-07 16:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f561a7d09a39be5e1d78c9f409620254 SHA-1: 2cf8ecffdc395e5b4e2d69913fd6194ab1a83220 SHA-256: 9f343b21a3e65dbfd7689ce9aec0985a692b2c74ebaff5d06957463504bf583f
66 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 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 4

  • 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://crophysi.ru/strik?utm_term=first+spider+man+comic+1962 PDF link annotation
    • http://nigemutekilum.mypressonline.com/kafaniwifivimanokul.pdfIn PDF document text
    • http://imedo.ru/trench_assault_hack_version_downloadcunw2.pdfIn PDF document text
    • http://lozomaneje.getenjoyment.net/belibokeworogupomigug.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/jipanasipenajisogedebav.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/hfhammZ/video_editor_app_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/poxirowo/meiggjj/broworld_a_douchebag_adventure_simulation.pdfIn PDF document text
    • http://werenntaq.online/faxozudupozepefabud54re1.pdfIn PDF document text
    • http://werenntaq.online/what_does_a_school_board_trustee_doz9n79.pdfIn PDF document text
    • https://cdn.sqhk.co/lokabawopup/CjfjcHp/78624799901.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/k1athfv/little_alchemy_game_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/bhdgd7C/fishdom_app_free_download.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://xuvekixofeku.onlinewebshop.net/aldehidos_y_cetonas_propiedades_quimicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759e161f-8e11-4b4e-9946-c133f04e8efa/25435501132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f34260-a394-429d-a537-8a3eac8adfb8/61437320980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf5daf8-9b14-48ef-9da8-c88e52f30bb4/97562881585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22780d77-1bc2-4730-83a4-a018fa771ace/97694954927.pdfIn PDF document text
    • http://vunonam.atwebpages.com/calicalabozo_andres_caicedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ada85b-8ee9-4594-a805-1586958ff14d/cyber_security_engineer_average_salary_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05417f5-95db-4f89-8f49-345f0cea0945/lewifuroxugudilibafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5aaabc6-5970-4492-8873-200c5a2e89ba/devi_bhagavatam_telugu_audio_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586b50ef-ed4d-4594-b6ad-3203c88054da/6364664364.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC61 5424 bytes
SHA-256: ebaf0d46291b50ac0dbd90e3d850cdb14138211b6e3bdbad2de638a6580103ce
font_01_sfnt_off0000feaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAF 11100 bytes
SHA-256: 2793289bb85dd25ad67e49ba899d2537833f12b21e1f7f18249646f6fa9f7d32
font_02_sfnt_off000124ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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