Malicious PDF — malware analysis report

Static analysis result for SHA-256 5602e56d2a448383…

MALICIOUS

PDF

78.5 KB Created: 2021-04-01 13:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1786d5bde3d08ee4e33ce94aa6f12b39 SHA-1: e33209481fc2e2e81d8125f912a273be4f8bd4ab SHA-256: 5602e56d2a44838342d092199268b10781fb9a46e2243245a4048489b2800a65
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 0.9993

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://bologen.ru/award?keyword=tactics+in+football+pdf PDF link annotation
    • https://cdn.sqhk.co/tedefoso/kaiihdD/pekewoxewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489839/normal_5fd665d225951.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/gfEhejb/best_craft_glue_gun_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/tobipamu/ehdghgd/sowupewu.pdfIn PDF document text
    • https://cdn.sqhk.co/bepesewutu/hdghgg3/pc_building_simulator_free_download_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380871/normal_603f9fb0841a8.pdfIn PDF document text
    • http://gabameled.22web.org/roman_catholic_priest_uniform.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_6041ab420b941.pdfIn PDF document text
    • https://cdn.sqhk.co/duponetix/jd1gjid/towipikizolager.pdfIn PDF document text
    • https://cdn.sqhk.co/sizebadit/ZGgKhjM/64902452084.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/i5Lhcgc/nowenizojemezopewen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483388/normal_5fedfcdff3809.pdfIn PDF document text
    • https://cdn.sqhk.co/kadukugobug/lSshahg/diy_aquaponics_plans.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/4ad71d02-b293-419f-bc58-34875ba3b6a2/where_is_the_starter_relay_located_on_a_2003_toyota_corolla.pdfIn PDF document text
    • http://roxigivakupumun.epizy.com/adjectives_and_adverbs_worksheet_4th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4873b6cc-19a3-4c1d-9dab-5723ab82a43f/hamilton_beach_dual_breakfast_sandwich_maker_bed_bath_and_beyond.pdfIn PDF document text
    • http://famekemij.epizy.com/xukub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/395091ee-5497-487a-922a-7bdf1f3852ba/cant_feel_empathy_or_sympathy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81f3083a-0669-40f2-9830-9bba5d8aff17/what_words_do_u_not_capitalize_in_a_title.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d33aa9-2893-4a72-bb61-567a40b34aa2/xigoboxina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e1be68-b61f-4477-a98a-364378d604d2/68567385882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8632ee52-0f90-4400-9e56-8d351aa1ed90/falekovatudunesox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d235fd8a-4c34-44c2-bde5-5d0833685c0f/guzogoz.pdfIn PDF document text
    • http://polezupi.rf.gd/assignment_of_rights_and_obligations_under_a_contract.pdfIn PDF document text
    • http://bozivexaterem.epizy.com/3319323259.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_off0000f5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BE 5144 bytes
SHA-256: fe8988a1b40c6a0fc1887c581220a0935bbbab128692fbeced5dc25280f86668
font_01_sfnt_off0001074b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074B 10944 bytes
SHA-256: ea2d64071dfb3ac5e85b2d381666e5a01b322368391d6ad465585999f1f1b991