Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d3c9f6502b23573…

MALICIOUS

PDF

89.8 KB Created: 2021-05-03 18:57:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1fa62e391c3e2826b51a72afbece14e9 SHA-1: d6ecadf0267fd064f2851b6e3006e5cce8c66dd4 SHA-256: 7d3c9f6502b23573564b74388fdeea0543faf35e91c59fb1dcc2caa1def18870
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 0.9996

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://baarspo.ru/strik?utm_term=mark+hanna+apush PDF link annotation
    • https://cdn.sqhk.co/lumolixuwo/jNiiY01/ava_lockscreen_apk.pdfIn PDF document text
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/sigidabowip.pdfIn PDF document text
    • https://libotavod.weebly.com/uploads/1/3/0/8/130813055/6755792.pdfIn PDF document text
    • https://garururukipu.weebly.com/uploads/1/3/4/2/134235121/5704160.pdfIn PDF document text
    • https://cdn.sqhk.co/ribuwikoli/oWAgacC/62861527206.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/jidjcjj/95011661590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_600c460fc6a0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448137/normal_60060c0bd39a2.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/ghjSBge/folovakoma.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/juwofuxufijup/website_https_www.activehistory.co.uk_ww1_trenches_index.php.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/62121139256.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/earn_merit_badges_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5160853c-a59a-4154-99b5-8d049264a979/19874656319.pdfIn PDF document text
    • https://9f503c4c-bf14-4dcb-9a7a-68e0e5bb3568.filesusr.com/ugd/8ac1ab_f99e4cf20be040a7a1613bb317018ccd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a75f4796-2284-447f-9f08-96f99cf16b8e/winnie_the_pooh_treasury_book.pdfIn PDF document text
    • https://43a98339-0465-49d0-a416-8cef4780896f.filesusr.com/ugd/89258f_96e0ea7eeeea46979e8d244605c4c2f4.pdf?index=trueIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_567f5b2054ad441d99f64c54a447e6db.pdf?index=trueIn PDF document text
    • https://c93ae04b-3d95-4128-ac62-0503c91a26e1.filesusr.com/ugd/002f5e_346fc46065534ecc995a65a514602a60.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5bf8e2c-515c-4736-a00a-16c88cd962a8/fitonavaw.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/lofezogibuvovekudozi.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_6d0897cd4cd84d598065326c6e5274ad.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3D 4944 bytes
SHA-256: c38fe6a6c91e4a4b984d3553b3cff0b6afd850a972cc47154b7bae9463acd8a9
font_01_sfnt_off00011b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B13 11796 bytes
SHA-256: 951965310c0067ee6e1b6eeb0fb32e95c6a7c0580ae8747126c6c24eed566959
font_02_sfnt_off00014331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14331 16276 bytes
SHA-256: 544ed1cbd1664a402e14a1d35f9fce741050e63885522ac44ab27abc4ca7c262

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