Malicious PDF — malware analysis report

Static analysis result for SHA-256 88785b38ae5ac34a…

MALICIOUS

PDF

43.9 KB Authoring application: PDFBox First seen: 2020-09-24
MD5: ac133a3d63bafba538d11429ee343e94 SHA-1: d602216a46773accf611b39f0d3ca26365ae3648 SHA-256: 88785b38ae5ac34ae5acc63860edd666200c8865de12da1fc164459ab5f146b0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links to other PDF files hosted across various domains. This technique is often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, aligning with the PDF_SEO_LINK_FARM heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://swarmstudios.com/uploads/1/3/0/6/130621788/talid.pdf In PDF document text
    • http://www.yourprintscharming.co.uk/uploads/1/3/0/5/130550682/19ac03008b.pdfIn PDF document text
    • http://vigrinhotels.com/uploads/1/3/0/5/130551687/1844690.pdfIn PDF document text
    • http://openarmsbanduk.com/uploads/1/3/0/5/130543276/8581396.pdfIn PDF document text
    • http://captreefishingboat.com/uploads/1/3/0/7/130738657/509b5b.pdfIn PDF document text
    • http://ay-kay.com/uploads/1/3/0/6/130621413/pupepuzowegesu-bevujupabuk-dutoton-pipegosisu.pdfIn PDF document text
    • http://tintanton.com/uploads/1/3/0/4/130478566/c1b3f468d3d212.pdfIn PDF document text
    • http://nicholasjozaites.com/uploads/1/3/0/4/130483638/5c85d5c68.pdfIn PDF document text
    • http://aprendeinlgesrapido.com/uploads/1/3/0/4/130476327/sezefinub-piwasipuwubowaz.pdfIn PDF document text
    • http://viptraininghub.com/uploads/1/3/0/7/130740480/rerofumade.pdfIn PDF document text
    • http://merrifieldseminar.com/uploads/1/3/0/6/130604779/f1b7e.pdfIn PDF document text
    • http://pinewoodcabins.com/uploads/1/3/0/7/130775878/rikenadizegizuj_buwepixoze_lobazizadeneje_ziwuvaruvakil.pdfIn PDF document text
    • http://rrgdigitalmarketing.com/uploads/1/3/0/2/130272582/7250237.pdfIn PDF document text
    • http://christinalozanofier.com/uploads/1/3/0/5/130550973/9898272.pdfIn PDF document text
    • http://classicalteachingtextbook.com/uploads/1/3/0/4/130476185/fevujibipufuku.pdfIn PDF document text
    • http://rosegold.club/uploads/1/3/0/2/130287502/1102271.pdfIn PDF document text
    • http://jccartstudios.org/uploads/1/3/0/5/130551770/zuwenesu-genigunoxufodem-duguziligefize.pdfIn PDF document text
    • http://hoyporvos.org/uploads/1/3/0/5/130541271/zopadejemeb_vajufu_ledagarako.pdfIn PDF document text
    • http://swankyfork.com/uploads/1/3/0/6/130639815/1041851.pdfIn PDF document text
    • http://strawhatgames.com/uploads/1/3/0/4/130476766/koseloso.pdfIn PDF document text
    • http://jeffhagemandesigns.com/uploads/1/3/0/2/130270812/905438.pdfIn PDF document text
    • http://joyfulearthsoaps.com/uploads/1/3/0/6/130640114/8634334.pdfIn PDF document text
    • http://www.a-sacramentoprocessserver.com/uploads/1/3/0/3/130313022/09f8f74d100c4.pdfIn PDF document text
    • http://mirthrot.net/uploads/1/3/0/5/130588913/texufopifeji_jivenuti_vovuled.pdfIn PDF document text
    • http://xinli88wangshangyule.br3h.com/uploads/1/3/0/4/130435562/130435562.html#spring+math+worksheet+for+kindergartenIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE8 16248 bytes
SHA-256: 866065d7495d295defe4cf0ba066740ca94c0fd4acdeb52af6aa5f9f9bb0960b
font_01_sfnt_off00004739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4739 8100 bytes
SHA-256: 169b11c09216a0312981b29ce238b82816c6d942cbff32c7dc1e29f7fec40bdf

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