Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc16353268e09d8…

MALICIOUS

PDF

78.2 KB Created: 2021-03-09 09:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9d3b0717d282e733e6fdcf88986c65c3 SHA-1: a5d29679c2f2e34d64eac23b96117491ca79cda2 SHA-256: dfc16353268e09d85cda4980b27fa0adef6a546842e707e44697f4ba450803fb
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 0.9995

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://jottigo.ru/aws?utm_term=pasos+para+hacer+un+bosquejo+de+investigacion PDF link annotation
    • https://bojowavezuzabi.weebly.com/uploads/1/3/1/3/131382797/xipavegelebad-lajigosojum-bapes-moveru.pdfIn PDF document text
    • https://cdn.sqhk.co/bikulatitaxe/ijiFr0t/74776800437.pdfIn PDF document text
    • https://balikawe.weebly.com/uploads/1/3/4/6/134659528/ec2772.pdfIn PDF document text
    • https://cdn.sqhk.co/refevebux/ahb5ejc/sky_force_cowboy_space_3d_mod_apk.pdfIn PDF document text
    • https://wudegilunukoga.weebly.com/uploads/1/3/1/3/131379548/e573cc8053ce445.pdfIn PDF document text
    • https://cdn.sqhk.co/vojazodelud/iagZhcK/97860474344.pdfIn PDF document text
    • http://czecheducation.space/mitrokhin_archive_2_indiacg2hy.pdfIn PDF document text
    • https://bubafoxir.weebly.com/uploads/1/3/0/8/130874260/xepidak-xukogalaxexu.pdfIn PDF document text
    • https://cdn.sqhk.co/pagozixupezi/cqgjZhj/funny_lock_screen_wallpaper_hd_download.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/aditya_hridaya_stotra_mantrag9na1.pdfIn PDF document text
    • http://veronaital.space/33815007398ba1xk.pdfIn PDF document text
    • https://vutavevivusupe.weebly.com/uploads/1/3/0/7/130776898/aef617492.pdfIn PDF document text
    • https://cdn.sqhk.co/mewoveri/jghe2v4/gitati.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/laginekux/appropriate_age_to_read_the_little_prince.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/002c377e-c247-4a60-b39e-322fe0c1f987/turning_problems_into_opportunities_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bce7f687-bb0b-4805-910b-fb5248bf2e16/how_to_use_quick_results_for_nclex.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/jufawibajilegimilisi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/678f1390-4e1a-49c0-8344-4664e1a89ebf/bomomosolajo.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/53857901009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad8792a1-6674-43a9-9d2e-10bf9326a7f9/cuisinart_dcc_3000_12-cup_on-demand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef8950d4-b8c2-4e30-888d-bf9519311a61/genesis_chapter_1-6_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/binomial_distribution_table_n_100.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_off0000e7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BA 1584 bytes
SHA-256: 7b163f0f2273e457ef06140b984bd667b01bbb3c14eac7ece172106c69300d65
font_01_sfnt_off0000efc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 5708 bytes
SHA-256: dee2ad0d4f185d4c38239e178e9a8da3d88c5f1b0f6bf45db17810d6bfeaa2a9
font_02_sfnt_off00010327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10327 11632 bytes
SHA-256: 17b5acf5885ce1257bb671fbeb951909baab3361bb728a1e0aec5b9caee2e15c

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