Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f17803d00fe4a7…

MALICIOUS

PDF

78.2 KB Created: 2021-03-09 05:45:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: aff2d4d85980ac99ab4cd6f577d9bad2 SHA-1: 660f0279432691b2063fbbe7d26a0d78e50f5778 SHA-256: a7f17803d00fe4a73f635392f499a5b706e25a41c3530fe207ecc3ab8e0917ee
184 Risk Score

Malware Insights

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

The PDF contains embedded links to known malicious redirector infrastructure, specifically `https://dafemum.ru/wix?keyword=mrs+williams+google+classroom`. The document's structure and numerous links to disposable domains suggest a link farm designed to obscure the ultimate destination, likely a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=mrs+williams+google+classroom In PDF document text
    • https://madoguwulivusi.weebly.com/uploads/1/3/0/7/130775056/9824985.pdfIn PDF document text
    • http://excschool.ru/the_satanic_bible_epub_download0eiyq.pdfIn PDF document text
    • http://copriyghtconfirmed.com/caanz_financial_reporting_handbook_2019q6wt5.pdfIn PDF document text
    • https://cdn.sqhk.co/subesanodag/jgs84gf/garage_wood_shop_layout_ideas.pdfIn PDF document text
    • http://stickerrus.ru/mankiw_economics_notes62iz2.pdfIn PDF document text
    • https://nisikigibifug.weebly.com/uploads/1/3/0/8/130813528/17b89b917.pdfIn PDF document text
    • https://cdn.sqhk.co/rexukewanej/BgeJicD/marvel_realm_of_champions_release_date_ios.pdfIn PDF document text
    • http://helplnstagram-confirm.com/buffbars_guide_lotrobchnz.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/fhjLcZO/heart_beating_really_fast_for_no_reason.pdfIn PDF document text
    • http://fionainthefield.org/the_death_cure_trailer_release_datejzl1g.pdfIn PDF document text
    • https://cdn.sqhk.co/dalegoti/0pS1VwY/7141882023.pdfIn PDF document text
    • https://lutigasudubuwa.weebly.com/uploads/1/3/2/6/132695203/bijagini.pdfIn PDF document text
    • http://bilet-pdd.site/what_are_some_literary_termsvmhnj.pdfIn PDF document text
    • http://kolomata.ru/why_did_maya_angelou_die1i7pn.pdfIn PDF document text
    • http://kersita.fun/cules_son_los_sacramentos_y_su_significado90emt.pdfIn PDF document text
    • https://cdn.sqhk.co/rosafipex/h9icqgg/75810702964.pdfIn PDF document text
    • http://fortuneocredit.com/mezoropedazebblyal.pdfIn PDF document text
    • http://aromaita.space/20398230232lqmst.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://520c840f-7702-4e28-87de-278da5b03b63.filesusr.com/ugd/e633b3_cb83481e90a94fc2a8d01e1dffc164d6.pdf?index=trueIn PDF document text
    • http://xozodede.rf.gd/amplified_minecraft_world.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_ccb24b67ba0747779d5b66df040a36b9.pdf?index=trueIn PDF document text
    • http://zojofat.epizy.com/51302510520.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BA 5216 bytes
SHA-256: f225d441b4994c245c1053e92301c58780501f32c1a2a6123bb2f566cf6db91a
font_01_sfnt_off0001057e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057E 11220 bytes
SHA-256: 553cfae0d62bd3ba11c142f30898734f40b543e94a978dd4c1a78e1d9e627577

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