Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf76e185a12935e…

MALICIOUS

PDF

72.8 KB Created: 2021-03-11 18:58:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a4a40f294e48655c0bcb3901ec494a45 SHA-1: a820d653e5e5cefa76b203ae5303c1524bdbf45d SHA-256: 9cf76e185a12935e5b2e1ffadac2735d7b258a3317e5dc77929bff8e2ddae751
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=ge+spacemaker+microwave+handle+fix PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365539/normal_6042da7398eb4.pdfIn PDF document text
    • https://cdn.sqhk.co/vusanutoj/aOYIGge/fitimagisujigawavoxigaj.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/hIiCZOb/kejegakisu.pdfIn PDF document text
    • https://cdn.sqhk.co/wirowanorax/fhGY6gc/pocket_mine_2_cheats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_60160ae6952eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493553/normal_5fff9adb89ef5.pdfIn PDF document text
    • http://raxuzogigegekaj.66ghz.com/bazudodesozetag.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/ajiihgg/kanto_power_collection_box_walmart.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/4883a377-927f-4723-bad4-71527659ca97/malezupegep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/537cdcb4-793a-4d18-a43e-44bda356bf2d/92587966194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/278efadc-b806-467f-b675-4b92d9da128b/what_is_the_origin_of_police_in_america.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/cooler_master_storm_stryker_atx_full_tower_case.pdfIn PDF document text
    • http://feneluveje.epizy.com/sodastream_spirit_one_touch_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e050a2-0803-4056-95a0-8368877ce088/el_lazarillo_de_tormes_english.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/what_is_benchrest_shooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac16dac-b9ac-46d8-b1f6-38bf8aac33f3/everstart_750a_jump_starter_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea34d3b-c48c-4c54-85d5-dce556c3b1e4/minn_kota_riptide_55_sc_t.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/karijazinefiravogaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c1967d-8af2-4eee-8469-03f1c7f92620/how_do_i_set_the_lecoultre_atmos_clock.pdfIn PDF document text
    • http://bitegovaduxigag.epizy.com/dormant_company_accounts_and_tax_return_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/baby_shower_emoji_pictionary_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e0da910-5ecb-4b00-8602-9d8d442d6d57/how_is_a_birds_beak_an_adaptation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29a60d57-509d-4a68-b474-289f889d3e44/microsoft_store_-_walt_whitman_shops_huntington_station.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_off0000e0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 5712 bytes
SHA-256: 6d58de3dd145066393e7b050141d87c3d2869ebf20472728229d27010bc12298
font_01_sfnt_off0000f440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF440 9804 bytes
SHA-256: 3e93de8d67bfea9b86dd0dceda3bb2dc421e1ac00ef937965ca4a0547883d1fe

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