Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3877958acac9353…

MALICIOUS

PDF

72.0 KB Created: 2021-03-26 11:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4265b4c756afcab4a31b4be7f51b7afc SHA-1: 1547124e3866679b681140ff37c2675b09816974 SHA-256: b3877958acac9353968918ece3eb1ee5457ebc0a027048e2fa7d75f1ad1bc57c
156 Risk Score

Malware Insights

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

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 0.9998

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 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.
  • 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=shinmai+maou+no+testament+ova+episode+2+sub+indo PDF link annotation
    • http://damvglaz0.xyz/open_figure_matlabtyq21.pdfIn PDF document text
    • http://alexsaf.ru/running_fred_para_hilesi_apkrplbt.pdfIn PDF document text
    • http://biomaniks.website/wiguziwozrfweg.pdfIn PDF document text
    • https://cdn.sqhk.co/xarepunekifa/SQXb8gh/video_call_app_for_ipad_and_android.pdfIn PDF document text
    • http://afracheat9.xyz/blockman_go_apk_hacktec59.pdfIn PDF document text
    • http://wowitaly.pro/ap_human_geography_ap_test_practiceve4ta.pdfIn PDF document text
    • https://cdn.sqhk.co/lomokubaf/jfgcVA6/monigonujubezoxefipi.pdfIn PDF document text
    • http://obzorov.site/obusforme_mattress_warrantye3i3u.pdfIn PDF document text
    • https://cdn.sqhk.co/nomuzali/ibkCjje/76510958937.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_3bdc56776be1400ab461bb3cd7d67fac.pdf?index=trueIn PDF document text
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_23246802b08a470a83ab327a6de7abb4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/directors_loan_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/what_is_the_fountas_and_pinnell_reading_level_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/what_food_is_good_for_menstrual_pain.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/gidabovavamobebapuze.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/what_is_power_and_politics_in_organizations.pdfIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_546da12c9a16475aa5eaeeef5e6e3aef.pdf?index=trueIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_7d61c7b978684f63b608c618f8add169.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/file_cheat_koin_dls_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/algebra_nation_algebra_1_practice_book_answers.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD892 5504 bytes
SHA-256: 7146092bfc53c22591f98e4e2634da436d97e683a269eb406ba393df203baa44
font_01_sfnt_off0000eb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1F 12444 bytes
SHA-256: 824bf66460ea986b9a06c63ce995522b64e9639c6389bd3e34dce26f33c8fa70

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