Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf5781bf5184164…

MALICIOUS

PDF

73.6 KB Created: 2021-03-20 01:53:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf41d7bdb5de40b27be5935f266b1038 SHA-1: 82dd0b346b408771b24db8f754bbdd919c53a8e3 SHA-256: fdf5781bf5184164d52125c5d5f5f455618924b6416edef0fd2648fb349fedce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one heuristic specifically identifying a 'link farm' designed to host many PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's part of a campaign to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9807

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nipisod.ru/award?keyword=detailed+lesson+plan+in+english+grade+3+pdf
    • http://xinupavob.iblogger.org/31279094277.pdf
    • https://bufibetotireguk.weebly.com/uploads/1/3/0/7/130739935/wememukodiwi_wiwopak_kabegatojude_jepawasukud.pdf
    • http://dedokomaweza.22web.org/lurozegaxexuvive.pdf
    • http://lebojabufi.medianewsonline.com/83572839351.pdf
    • https://dulipitigisol.weebly.com/uploads/1/3/4/7/134717891/9347351.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lusegokaves/sand_balls_mod_apk_unlimited_gems.pdf
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_32b82380e98447c9afe3adeb1c5d890f.pdf?index=true
    • https://f5ab370f-1445-465c-ae0a-adb246d340ff.filesusr.com/ugd/2d95ce_55dfe371dce94b0ea5264aeb49620935.pdf?index=true
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_3df30cb06ff547c0ab2e60c405b9f707.pdf?index=true
    • http://runuwug.myartsonline.com/scott_mccloud_understanding_comics.pdf
    • https://s3.amazonaws.com/ponivotigegepub/12949610747.pdf
    • https://s3.amazonaws.com/kizugokofo/45164068040.pdf
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_80adc497d34744f39fa761d6d8b4c2fd.pdf?index=true
    • http://desovizipelo.onlinewebshop.net/endospore_staining_principle.pdf
    • http://megigezorozo.atwebpages.com/survival_games_free_unblocked.pdf
    • https://s3.amazonaws.com/kibavutibeved/airistech_nokiva_user_manual.pdf
    • https://s3.amazonaws.com/dumupa/90163141967.pdf
    • http://pikubub.onlinewebshop.net/mga_bayani_ng_pilipinas_at_ang_kanilang_talambuhay.pdf
    • http://xezaretidatoro.onlinewebshop.net/wudalanog.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f993.bin
b9e9748de849ab3368863a4ca5597a1e4340c20a6259199bf6a6e0014f569f65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF993 5468 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.