Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f772b54525918f2…

MALICIOUS

PDF

81.2 KB Created: 2021-03-22 02:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0d352d82a75c5414459f7d00f711ca25 SHA-1: 2c7f88c51cadf3c066362b6ed0a9ecc0a1be413d SHA-256: 2f772b54525918f2c3008db8411fa9cc7e44a9beca11b28dd7cd2bf28bc0ac7f
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 0.9994

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://midufefew.ru/strik?utm_term=what+is+the+meaning+and+definition+of+curriculum PDF link annotation
    • http://randname.ru/beer_mechanics_of_materials_8th_edition_solutionse61am.pdfIn PDF document text
    • https://leresidatebij.weebly.com/uploads/1/3/0/7/130776374/2598527.pdfIn PDF document text
    • http://persequen.com/tyrion_lannister_father_deathm4glw.pdfIn PDF document text
    • https://razosopowob.weebly.com/uploads/1/3/4/5/134509902/d98db85eaa2.pdfIn PDF document text
    • http://testersairf.xyz/rovatupapabumuzebewima4q3gp.pdfIn PDF document text
    • https://nepibosumu.weebly.com/uploads/1/3/4/3/134363752/63ac20fde4f8a.pdfIn PDF document text
    • https://nibowivuxewanu.weebly.com/uploads/1/3/1/3/131379040/nufuwesunepojuwatu.pdfIn PDF document text
    • https://pidujalibogi.weebly.com/uploads/1/3/1/3/131380128/1194052.pdfIn PDF document text
    • http://helplnstagramoffice.com/johannes_itten_the_art_of_color_downloadzafko.pdfIn PDF document text
    • https://xuwejemeluk.weebly.com/uploads/1/3/4/3/134314543/dugorokakudij.pdfIn PDF document text
    • https://fibigator.weebly.com/uploads/1/3/4/3/134313363/a48bf5e7bb6cc.pdfIn PDF document text
    • http://topchambre.xyz/brahman_naman_movienpaus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/84021191591.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/wilaxoxilodebegevafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc80f62-5f4c-4a2c-b029-5a874a41b9dd/how_to_pair_ihome_speaker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d028ac4-c101-46cd-9d09-a3afc5a2c2c2/classroom_management_strategies_for_elementary_substitute_teachers.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/lethal_fetal_akinesia_deformation_sequence.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/parquet_courts_human_performance_blogspot.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/acritas_legal_spend_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/578b99a5-19f8-4d4d-a404-c6956a18dbaa/xezififomez.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/how_to_set_a_manual_timer_on_dish_hopper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc74873-3762-45a2-8456-3b28bc76b1fb/miranda_cosgrove_moon_meme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5819637-be4a-44c5-8774-9f9ca5a1faa6/how_to_do_a_wire_transfer_with_suntrust.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_off0000ff69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF69 5448 bytes
SHA-256: 89a3781fffbad9b225e54b1d1f5e124b1d1bc1639d509189fa42a9dee9568fa1
font_01_sfnt_off000111d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D4 10404 bytes
SHA-256: 14ba7b06041cf5605aad3ae5447f845e8ac968d20f4920381d5d4cf96be98af3

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