Malicious PDF — malware analysis report

Static analysis result for SHA-256 81f660a4e043f15a…

MALICIOUS

PDF

230.8 KB Created: 2021-03-17 16:47:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f9eb0b1c4383592b810ea4a3bc63dbde SHA-1: 5a973c6720877bfad42d366e9072d6dec50d0cce SHA-256: 81f660a4e043f15a1b2fe3998e0d163cf1ce20d6d68a8d7bc3d0ff9c78175d17
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or distributing further malware. The document body is heavily obfuscated, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/strik?utm_term=what+is+magical+realism+in+film PDF link annotation
    • http://rosutob.getenjoyment.net/83078177679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473645/normal_5fdb3178c3281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467576/normal_60322daa9c030.pdfIn PDF document text
    • http://1xbet-registr.site/ernest_hemingway_indian_camp_analysistfzwx.pdfIn PDF document text
    • https://cdn.sqhk.co/bubuzibiv/jjckQjb/pakujodofel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409238/normal_5fcc6f5b29e1c.pdfIn PDF document text
    • https://cdn.sqhk.co/rutesawir/jg9jggh/skyblock_wiki_enchantments.pdfIn PDF document text
    • http://myimperfectmomlife.com/71034048206gzasa.pdfIn PDF document text
    • https://cdn.sqhk.co/dibidoretu/Ks9dbgh/sasonimogesofopatojow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_6044facb1c10b.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/26540897689.pdfIn PDF document text
    • https://cdn.sqhk.co/legikowe/5thbjiY/lekiwonudegesuwerotoku.pdfIn PDF document text
    • https://cdn.sqhk.co/kogujipubap/gNjgdid/880488601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449183/normal_5fd1c9b9420b2.pdfIn PDF document text
    • http://pro-komp-master.website/ytd_download_status_upgrade_to_proros2l.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/0ed9a694-2d48-4cd1-b541-68bc2483fdda/what_is_another_name_for_multiplication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e521d5-f579-4ad4-96b3-e70ac92888e9/77523868689.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a0c6c2-a0e8-45b7-bf83-0edcec4f6e1d/mudagelenobojanux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce11cfb3-7362-4271-be0c-e6042e1c2268/ripilibox.pdfIn PDF document text
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_77f0d047a649405da8ab3d488768c08f.pdf?index=trueIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_94b2b588faec4a01833a956a4ebb7dd7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4596c1a5-c975-4670-b367-65b6880abc37/2004_ford_focus_power_steering_problems.pdfIn PDF document text
    • https://3dbd840c-7861-42b4-b064-af52d1d2f4eb.filesusr.com/ugd/86319b_845c232ab66d4b2cb8b3e87a00f21a8b.pdf?index=trueIn PDF document text
    • https://161abad2-7de2-49bb-9904-d6e2a620a662.filesusr.com/ugd/2eec94_5f8727fab0c04249b38fe570cc23507f.pdf?index=trueIn PDF document text
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_c3d88d75cd1c44da872ed326f8b7f756.pdf?index=trueIn 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_off00034c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34C94 5308 bytes
SHA-256: 489c01b0aab2c5196c8fa08597ae994b6e44f06a71e8785ef482768d0f59baf8
font_01_sfnt_off00035e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35E88 14600 bytes
SHA-256: a53b776fac3558cc875ccc34e1de724ce72f37dd3dc83ecfea57dd2e4c3f1316

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