Malicious PDF — malware analysis report

Static analysis result for SHA-256 75212ccd4323511f…

MALICIOUS

PDF

106.2 KB Created: 2021-04-11 15:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fca724fa98ab403877ae9389fe5f24b9 SHA-1: 506541c91d6af437eccc201f057ab08cef39f8eb SHA-256: 75212ccd4323511f2310aeb17e0e192913d5f6791b984143977342903a1c5a2e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9846

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/strik?utm_term=five+nights+at+freddy%2527s+1+song+mp3+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420906/normal_604f25bd00d35.pdfIn PDF document text
    • http://prazdnikprosto.ru/javitemuwaz4ppwg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_60469ce1c548e.pdfIn PDF document text
    • https://manomukujoputu.weebly.com/uploads/1/3/4/5/134517900/wiwew_zotimidepugizud_gewamiban_buwosez.pdfIn PDF document text
    • https://vobelorigod.weebly.com/uploads/1/3/4/0/134096073/wulux_sadudawitaza_fidesowesago.pdfIn PDF document text
    • http://nextauto02.ru/sony_bdp-bx59_no_soundv1nrx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415292/normal_5fe52d0d7b7fc.pdfIn PDF document text
    • http://titoto.xyz/examen_de_excel_avanzado90k4z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387046/normal_600212dab8b39.pdfIn PDF document text
    • https://zanefasijim.weebly.com/uploads/1/3/5/9/135965469/lonejona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_6049e5df849f6.pdfIn PDF document text
    • http://meriline.store/28694379467hcdhi.pdfIn PDF document text
    • http://1freedom.space/pimaxokedezuruvivopokelakhhwwh.pdfIn PDF document text
    • https://pasironukid.weebly.com/uploads/1/3/0/8/130814081/9834271.pdfIn PDF document text
    • http://sekewutu.iblogger.org/wavegise.pdfIn PDF document text
    • https://begakidiwadagav.weebly.com/uploads/1/3/1/3/131397934/fekanumujagalot-purax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/10299bf4-9c25-4391-905d-ab64bd3bd530/petiwebusiropetivekilikow.pdfIn PDF document text
    • http://dikokek.epizy.com/63332880615.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be5fdbe-3037-4ced-af8a-bd5399eddaa3/how_to_clean_bissell_powerforce_helix_filter.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off00016dfb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16DFB 18176 bytes
SHA-256: 9a53eb0f5d899206140142024e1329928d04523b9b037af6ea44b3d64dff0b7c
font_00_sfnt_off0000e60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60A 5684 bytes
SHA-256: d9df6945b54372b4ce1b038b385752c5e534dd56f39eb70cfae60a2504a527db
font_01_sfnt_off0000f9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E6 5916 bytes
SHA-256: ea3647adb0389364d9239b56fe0558ffb3a29cbed82df7acec05955cca53e6ba
font_02_sfnt_off00010e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E10 2656 bytes
SHA-256: dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5
font_03_sfnt_off00011914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11914 2328 bytes
SHA-256: 864cbe2c6973b44d2b71e19ffbffb2328dcb3759b07ceb43c11d5a372fc4956d
font_04_sfnt_off000123ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CA 2108 bytes
SHA-256: d117309382da938f7dffedc42f90dd4217b4d540d75629b80669d975ecbc171e
font_05_sfnt_off00012d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D95 6640 bytes
SHA-256: 538512be6c526ea957b587fa229624d829dca4873b622d187784a60d2c877fcd
font_06_sfnt_off00013f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F33 15488 bytes
SHA-256: 98e5592ebd912d29e043f08931b3c4ec6c64e94b50bbd09f20cdae1419ec1540
font_08_sfnt_off00018ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AC8 3276 bytes
SHA-256: c12c670e310cd2dd0f4b1ea6ea0d01ef35e1284caa1cfc967b978b02bd897c09

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