Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e65d7c4929f3fa…

MALICIOUS

PDF

74.8 KB Created: 2021-03-07 02:17:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 875e2d1068009b835a354eff7e94fc1c SHA-1: 27b862dc01c6e9c7e70e6dd6b34de04115ae4e61 SHA-256: e3e65d7c4929f3fa3f77794a791db9be794970cba983602c9e1b31a686b5b966
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links pointing to various domains, many of which are disposable. This behavior is indicative of a link farm, potentially used for SEO manipulation or to distribute malicious payloads. The ClamAV detection and ML classifier strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/wix?keyword=spanning+tree+configuration+aruba PDF link annotation
    • http://chambrely.xyz/hyvee_catering_guidehwir2.pdfIn PDF document text
    • http://jefuxifutubanal.iblogger.org/20674599637.pdfIn PDF document text
    • http://zzzmmmmejjj.space/86360175576rvgcg.pdfIn PDF document text
    • http://chunyoo.com/630246782055d9rz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4b67404f-136a-46a0-9cf3-151f2d38faab.filesusr.com/ugd/241fd5_0015d1f32c6743e5adb3e669d74ef554.pdf?index=trueIn PDF document text
    • http://kodireso.epizy.com/convert_sheet_music_to_midi_files.pdfIn PDF document text
    • https://18b62485-dce0-4e35-9712-b1d1f13fcb23.filesusr.com/ugd/296484_29ce0098a3bd484dad099133377a530d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7577abae-f52f-4086-9c97-a3ab10fd44a4/american_literature_books_for_college.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c653f780-10eb-4ee1-bc87-db16d50f6cbd/how_to_count_characters.pdfIn PDF document text
    • http://juwejaju.rf.gd/xubuwalejefe.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/minions_movie_2015_full_movie.pdfIn PDF document text
    • http://pitowurojagit.epizy.com/nurowedoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da260140-f13a-4143-9158-1b91731cd765/how_to_update_sky_q_box_to_get_netflix.pdfIn PDF document text
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_f713167ec1cb4a23a5db49ea4d49bdb0.pdf?index=trueIn PDF document text
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_1a0681ea7a464aa7915c535ac8a0ff71.pdf?index=trueIn PDF document text
    • https://61249681-e2d1-4375-841a-b3723294d79c.filesusr.com/ugd/3d514e_33ecf7bad95d4f79b94aa27afcf0c271.pdf?index=trueIn PDF document text
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_bdf42efc37c5495b8ef4454278d784f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/home_depot_behr_paint_rebate_form_2019.pdfIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_6fc2adf541284b7b89104a0e9fea5ee5.pdf?index=trueIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_61baaa12fd0f4c29b9dfb178e5366d42.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b32b4d3-3b46-470d-92fb-ab125d2f532f/deepak_chopra_quotes_path_to_love.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_off0000e902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE902 5216 bytes
SHA-256: d395aee7cf47b8be2bc9315532206b995aa3ae02b62198788554dfc59f17138f
font_01_sfnt_off0000fad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD5 10344 bytes
SHA-256: a7b71ce8497eaf63777e0dbb48f41cf58d4276c1eb8a38809c8203be14492840