Malicious PDF — malware analysis report

Static analysis result for SHA-256 a898ee7cc393e761…

MALICIOUS

PDF

52.7 KB Created: 2020-05-21 11:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: 72dad915fa8da590816be2307aaaa46c SHA-1: 3ef726c97cba75cb096cc99eaed6e7b3ca2bd7c0 SHA-256: a898ee7cc393e7612d3c33a71c68d0aad3b9566b0dd523aaed7b6d0d38307ec0
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, indicated by the PDF_SEO_LINK_FARM heuristic. The document body contains text related to software licenses and application metadata, suggesting a lure. The primary attack pattern involves redirecting users to numerous external domains, likely for SEO spam or to host further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://victorypayrollsolutions.com/uploads/1/3/0/6/130639590/130639590.html#licencia+eset+nod32+antivirus+9 PDF link annotation
    • http://insotalt.com/uploads/1/3/1/3/131382032/bukun_wixitoxusat_pijatololejop_zopedamodabo.pdfIn PDF document text
    • http://bigopmediainc.com/uploads/1/3/0/7/130740217/wefaselig_zetevomo_subijav_doribil.pdfIn PDF document text
    • http://natalieeldridge.com/uploads/1/3/0/6/130603809/1747040.pdfIn PDF document text
    • http://insequ.com/uploads/1/3/1/3/131380848/e4d1eb7a1.pdfIn PDF document text
    • http://alexparkinson.org/uploads/1/3/0/6/130604414/vurin-nodezisebu-tanutejuvupox.pdfIn PDF document text
    • http://mymssp.net/uploads/1/3/0/9/130969053/b7db1469d.pdfIn PDF document text
    • http://hiphopsdamagecontrol.com/uploads/1/3/1/4/131437693/sowedowawasitumoz.pdfIn PDF document text
    • http://kingsandqueensny.com/uploads/1/3/0/2/130272426/gozogu_jopaguvokusetux.pdfIn PDF document text
    • http://jsnobles.com/uploads/1/3/0/6/130621345/8314474.pdfIn PDF document text
    • http://allinonevacs.com/uploads/1/3/0/5/130539185/9509527.pdfIn PDF document text
    • http://storytimecorner.com/uploads/1/3/1/1/131163683/maparebukaz-jeparosetopis.pdfIn PDF document text
    • http://sheastrong.org/uploads/1/3/0/5/130538875/zomesubaxenaxe.pdfIn PDF document text
    • http://rockymountainmusicfestival.net/uploads/1/3/0/6/130639236/bubumudilam.pdfIn PDF document text
    • http://sendyouasong.com/uploads/1/3/0/9/130969747/9669502.pdfIn PDF document text
    • http://kolaygirisim.com/uploads/1/3/0/4/130478374/c8cedfc5e214d38.pdfIn PDF document text
    • http://leavesbylyrik.com/uploads/1/3/0/6/130605248/mupirat_gerudaxuveler_xowujuxefuduf.pdfIn PDF document text
    • http://auctiontrainers.com/uploads/1/3/0/7/130740212/vikefopubawoviduta.pdfIn PDF document text
    • http://romancified.com/uploads/1/3/0/6/130639896/koborexite.pdfIn PDF document text
    • http://adventuresinfaith.net/uploads/1/3/0/6/130620942/bitulupokujavef_zetumokudavi_jigeruv.pdfIn PDF document text
    • http://mycommunity.nyc/uploads/1/3/1/0/131070407/jufoti.pdfIn PDF document text
    • http://infermiereinzona.com/uploads/1/3/0/2/130289485/9104141.pdfIn PDF document text
    • http://mjgiftscompany.com/uploads/1/3/0/5/130543133/toxonija.pdfIn PDF document text
    • http://kbartistry.net/uploads/1/3/1/4/131438557/ratumekero-tiximixunabofu-perusogepenow-jubipopib.pdfIn PDF document text
    • http://prnstaffingsolutions.org/uploads/1/3/1/3/131383733/a825476ef27.pdfIn PDF document text
    • http://silvanfriedman.com/uploads/1/3/0/6/130621847/busagabesen_kodubiruwanubu_jokigof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFF 6744 bytes
SHA-256: ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
font_01_sfnt_off00007edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDB 2396 bytes
SHA-256: ba73f21ddc86149a129f02267fc66c249d57f059994a016b16354747eb6392c7
font_02_sfnt_off0000899e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x899E 11668 bytes
SHA-256: a3e103802d2138a2887f7616b55adb4320ff6eba7a86e39aec196fdc83f569a6
font_03_sfnt_off0000afdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDD 16304 bytes
SHA-256: 2ec471bc1dd097ba7445d0d98fae4076614f7d308a936bf5c28a382db3fe60d2