Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd085c1ca8d5b4d…

MALICIOUS

PDF

77.7 KB Created: 2021-03-10 09:32:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: becbb7d1abb2f377cd71b60d8781d798 SHA-1: 33673622b9320bb06eb34fdbf823f7a48cd44c8e SHA-256: 2cd085c1ca8d5b4d46d89849864ca1200d6eaf66a7bc098d16e50a915b69892b
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 0.9997

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/wix?keyword=epic+seven+time+zone+error PDF link annotation
    • http://copyright-infringement.business/osha_fall_protection_training_requirements_constructionglmep.pdfIn PDF document text
    • http://4bochki.ru/flute_music_sheetsouwpu.pdfIn PDF document text
    • http://samelike.site/world_history_ancient_civilizations_workbook_answersrr7t5.pdfIn PDF document text
    • http://copyrights-notices-helps.com/fluke_networks_intellitone_pro_200_probe_manualt9gcl.pdfIn PDF document text
    • http://sexedate69.site/251721622043ew1x.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/supreme_duelist_stickman6qnev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486778/normal_600d518a1ec9a.pdfIn PDF document text
    • http://tradestaroffice.com/51899173654qgdqj.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/4880766641345hz5.pdfIn PDF document text
    • http://wwnews.site/white_rodgers_thermostat_setting_time84pdi.pdfIn PDF document text
    • http://naturka.space/the_outbreak_movie_reviewuoonv.pdfIn PDF document text
    • http://kinokaiff.space/catvision_set_top_box_softwarerpvhp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459640/normal_6008cc21483d4.pdfIn PDF document text
    • http://begemotiks.space/vonutojajbiyy.pdfIn PDF document text
    • http://talakam.space/922433018147c4p1.pdfIn PDF document text
    • http://neo-tp.ru/singer_simple_sewing_machine_e99670r6fn8.pdfIn PDF document text
    • http://maykistore.ru/begum_bold_font_freecezhc.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/28cf3a22-b6d0-4319-ae80-e0294d6230f0/kivevujejezewixigiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d06d8f8f-74bc-4b3f-8a88-9bdfcc144857/mopupef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35cb266a-a620-42b7-a678-5013fd24c97a/11978278589.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_off0000f2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CC 4904 bytes
SHA-256: 12d03a062b1078834bf59035892386ee4f6227326be84c0b78540c3525a692dd
font_01_sfnt_off0001037d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 11740 bytes
SHA-256: fe7ec101e33b8c261e2ec22bb2a26dad5f8fb5f269860a5450e877269aeb47e1

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