Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e5c479f979f74b…

MALICIOUS

PDF

87.2 KB Created: 2021-03-23 08:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 87f55ce2042e536eb2914b07dea7b993 SHA-1: 9623ddcfea7fe1657052bd6c30547e3f0c1a4904 SHA-256: 12e5c479f979f74b55c1e954572ba64b161fd3e1cb3335ac4d31314a56852f99
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=the+stand+miniseries+2020+release+date PDF link annotation
    • https://cdn.sqhk.co/dorodidur/khfjeSJ/24590848260.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/iFheidG/animal_minecraft_skins_namemc.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/ee8tqOK/download_stormblades_apk_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/13jabT5/download_car_x_drift_racing_2_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/cg52Z46/52640945959.pdfIn PDF document text
    • https://cdn.sqhk.co/vaziworab/4jdifhe/44770400992.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/fheBVI9/woman_love_your_husband_bible_verse.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/nJjhIMv/gedebefi.pdfIn PDF document text
    • https://zevexeduj.weebly.com/uploads/1/3/0/8/130874566/7736325.pdfIn PDF document text
    • https://cdn.sqhk.co/jebozibiru/n7zBxlx/65909114427.pdfIn PDF document text
    • https://katalajoguv.weebly.com/uploads/1/3/2/7/132740778/1c81a3bd0419.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_1b13f33e33c746b19210818d74f0752c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a9b3fd-d825-46b6-8ed4-b4b4f3e46f05/hp_photosmart_c4580_setup_wireless.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ed3aa77-64ab-4fdf-a87e-bea33f5c561b/majestic_gas_fireplace_remote_control_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/680242f6-e156-4fd4-8fa9-67fb22f04938/30593706171.pdfIn PDF document text
    • https://69a7f268-727d-4112-ba4f-a3538cc856be.filesusr.com/ugd/9a0d60_69cb9a18f9a3473dbf34c89f6f9a5c78.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ed6f88-2d67-44ca-af66-3b669f6e8115/45500245802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d9ec233-8390-4b7d-9031-eac333658a83/28747465386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fd92fe-3c19-46a0-be13-4ead681c6903/toro_recycler_22_190cc_personal_pace_lawn_mower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59f13e50-3ea9-4eb4-8596-ab44ce877ad7/17870210634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb9b84f-cdb1-43da-b8f6-bda4aa53fde7/kebosesapowuv.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_off000116dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DD 5288 bytes
SHA-256: a272b6834532bd495967e89e1134eba0a19428ec9fbefcb32d49d22f95561268
font_01_sfnt_off000128a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A3 11580 bytes
SHA-256: a43fe6b688cfb88fa959cd2088ffe76f5c144df1e56dccf2cbf12daa94c10c2a

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