Malicious PDF — malware analysis report

Static analysis result for SHA-256 d869d8a3f6cdb2ba…

MALICIOUS

PDF

101.0 KB Created: 2021-03-23 15:13:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d5ed2440984b9f04a04dacf1edf66413 SHA-1: a085f727736da7d51110cb014cbdc295dd880e14 SHA-256: d869d8a3f6cdb2ba0389ae56a8587cc2495899088b5490a06db7fec6acdf0384
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirectors. The heuristic firings indicate it is a malicious redirector and a link farm, likely intended to phish users or lead them to malicious content. While no scripts were extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • 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://crophysi.ru/strik?utm_term=percy+jackson+disney+plus+auditions+2021 In PDF document text
    • https://pozajuraxox.weebly.com/uploads/1/3/4/5/134591712/dufow.pdfIn PDF document text
    • https://vepodiruwa.weebly.com/uploads/1/3/4/3/134374194/fosebalos.pdfIn PDF document text
    • http://segepivo.22web.org/hot_rolled_vs_cold_rolled_steel_sheet.pdfIn PDF document text
    • https://ziwevanefenej.weebly.com/uploads/1/3/4/5/134591483/xametu_sijok_girivulire.pdfIn PDF document text
    • https://xizadububexo.weebly.com/uploads/1/3/4/5/134595199/guvefaxun.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/how_do_i_set_my_petsafe_collar.pdfIn PDF document text
    • https://dekitinuro.weebly.com/uploads/1/3/4/8/134871397/vutamisekanojafit.pdfIn PDF document text
    • https://levukuwaxumofet.weebly.com/uploads/1/3/1/3/131383949/4192535.pdfIn PDF document text
    • https://robesiladobaluj.weebly.com/uploads/1/3/0/8/130813577/7c9155d70.pdfIn PDF document text
    • http://wiwovurezibaso.getenjoyment.net/i_dreamed_a_dream_vocal_sheet_music.pdfIn PDF document text
    • https://kumenesasewoton.weebly.com/uploads/1/3/4/7/134773405/177c1cfe9904988.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/7570932.pdfIn PDF document text
    • http://donenebexoxisik.22web.org/cool_backgrounds_apps.pdfIn PDF document text
    • https://lesikikonojen.weebly.com/uploads/1/3/0/7/130740189/lufuxemalad.pdfIn PDF document text
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/zixurales.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/vugaf_zanubuwo_murajeg_dexelidorotak.pdfIn PDF document text
    • http://wizatone.iblogger.org/bnf_73.pdfIn PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/3474696.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/kanomibu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kevulapoxokimif.rf.gd/what_are_the_first_20_elements_of_the_periodic_table_used_for.pdfIn PDF document text
    • http://fojijiguvixano.rf.gd/kebowapow.pdfIn PDF document text
    • http://sopexas.epizy.com/free_printable_budget_worksheets.pdfIn PDF document text
    • http://zewixezix.epizy.com/31092366661.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB2 5520 bytes
SHA-256: 7043e68441188730ade30382635e3218e0caf006ec0c0327847ccb1fec2ed112
font_01_sfnt_off00014e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E8F 11704 bytes
SHA-256: ef0dfafe5b4b9aec8c1759b8b8bc401f22f04a5489703d1979a78900673932dc
font_02_sfnt_off0001765f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1765F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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