Malicious PDF — malware analysis report

Static analysis result for SHA-256 91395b3ffcbb7d2e…

MALICIOUS

PDF

78.8 KB Created: 2021-03-23 09:40:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 808d15dffedebb4aab5408e4f08882c3 SHA-1: 21763283019c8256fc75621a93b26c152a831244 SHA-256: 91395b3ffcbb7d2e54200b7ca390e4fb65aabcac5bceb8da55163822d9e414a8
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 0.9992

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://nipisod.ru/123?utm_term=landlord+tenant+reference+letter+template PDF link annotation
    • https://posesisex.weebly.com/uploads/1/3/5/3/135332701/315efc.pdfIn PDF document text
    • https://muwubuzegutan.weebly.com/uploads/1/3/4/6/134649477/janufukasob-xokujediwipem.pdfIn PDF document text
    • http://avit0.pro/vagupebozexepugobefotqsaqu.pdfIn PDF document text
    • https://gigerexug.weebly.com/uploads/1/3/5/3/135341911/pajowo_tewelavotak_lidizu_rularid.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • http://sirofopunisatus.iblogger.org/chirutha_video_songs_free_3gp.pdfIn PDF document text
    • http://naturfresh.space/fusion_360_ita_crackz384v.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/ibxhi2R/studio._code._org_course_2_stage_8.pdfIn PDF document text
    • http://blancer.xyz/unity_stock_price_todayo3f74.pdfIn PDF document text
    • http://biweekamnf.com/infectonator_3_free_download_androidxdzuf.pdfIn PDF document text
    • https://cdn.sqhk.co/bodovukig/chhfhgZ/chrome_free_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/xotosira/Gxqgchc/carriage_hill_farm.pdfIn PDF document text
    • http://instahelpforbusiness.com/periodic_table_with_oxidation_numbers_and_namescv77m.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/zudugelila-debuwagaviraxu-xatora-jabobogurawomaj.pdfIn PDF document text
    • http://kefipipina.22web.org/how_to_introduce_someone_in_spanish_formally.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/d04e440b-4b2e-47d5-acb5-65caa29bd79a/19470520473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3797dd91-495c-4d09-afbf-c36e8df8b358/60225331500.pdfIn PDF document text
    • https://f1e11ea9-a931-46ad-af30-391325c877dd.filesusr.com/ugd/423518_1d78706dea444f46a391c6c9c9927d3a.pdf?index=trueIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_14e317af6534451fab10021c4c57ec6b.pdf?index=trueIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_ae05af68ebef4d75a9c340ff347f46a5.pdf?index=trueIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_6bd2b2f846524d38ac050c0d124628b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/af75abeb-af70-451a-a653-ede3c83d77c0/what_is_current_caliph_of_islam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/347b9728-7c0e-4ca7-b35a-fffd1d73baaf/city_of_ann_arbor_zoning_codes.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_off0000f627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF627 5064 bytes
SHA-256: aeed2a23f6d36d90b1bacd64da5daed11f5247d5848cb86620d725c198f7743f
font_01_sfnt_off00010755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10755 11164 bytes
SHA-256: 3aba0b2ef405c850a3e9a7b5e2f68d09fbb71b7e94133cf6e4fee80092a43fd7

Open this report in the interactive analyzer, or submit your own file for analysis.