Malicious PDF — malware analysis report

Static analysis result for SHA-256 5daa6838ae51f10c…

MALICIOUS

PDF

75.4 KB Created: 2021-05-24 14:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ab9eb86e6350d144ec7511eaa0a5ae5b SHA-1: f4d657df11a01e78f31b4bb13c2f11956f7f95bc SHA-256: 5daa6838ae51f10cea47cef88a7ebd36a9bdb49f48c059c639c0f05b8d892100
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://leonvi.ru/strik?utm_term=need+for+speed+no+limits+mod+apk+unlimited+money+and+gold+obb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463807/normal_606a1b0dbd191.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467589/normal_5fc6764122a9e.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/rufewifavete_lupiweva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391642/normal_60241e8226513.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459059/normal_5fe3d893d95c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421934/normal_6015badf27187.pdfIn PDF document text
    • https://popetufuwude.weebly.com/uploads/1/3/1/4/131483025/71155a35634d.pdfIn PDF document text
    • https://xidasosi.weebly.com/uploads/1/3/4/7/134722002/4167948.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejexe/daewoong_pharmaceutical_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20174c3b-faee-4add-ac44-72a82ea97cef/top_notch_fundamentals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea52259e-9eac-4d32-bee1-a169df3b006d/12791648732.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/76451290553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9993dcff-b732-4f23-aa85-0560874ba6a9/what_is_operation_iraqi_freedom.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/maytag_maxima_xl_washer_drain_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/2007_chrysler_sebring_touring_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4582dfb2-9945-4682-8f6b-cb0d75f23942/vif_scores_in_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56b7fef-11f6-4d5d-aac1-348af2320c98/types_of_text_structure_in_literature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32dd1b5e-da96-44b8-9166-bd83ce7ef0a4/house_of_night_untamed_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/personality_disorder_assessment_tools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5d8ab34-3f35-44b1-8393-22b935e23ea5/songs_about_broken_relationship_with_dad.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/zulidaberajavaponosuz.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/7555090552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a8edd8-26a1-477a-befb-61c2d9e40f84/wonotuxexa.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/how_to_fill_the_bissell_proheat.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_off0000ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE4 5636 bytes
SHA-256: 6155c00115852b40295739eedbb1a460ff1d0f5ed14af5f2339b12574d1c2619
font_01_sfnt_off0000ff08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF08 9572 bytes
SHA-256: 64ae32b7142569baeff507fee6cb1709ff1c75d1f252db064787cf0a30215b38

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