Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6ee2e736c2ec47…

MALICIOUS

PDF

86.9 KB Created: 2021-02-15 17:59:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 64254035f1053274697738836193a5e1 SHA-1: 27442e5350e344f01d50c4292f175bb5d4ffaeb5 SHA-256: dd6ee2e736c2ec471f51c6acc19a552f5d95ec20f2f5685f454a424b19f73f21
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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 https://druttle.ru/strik?utm_term=walmart+black+friday+2020+deals+for+days+11%252F14 PDF link annotation
    • https://xowozasa.weebly.com/uploads/1/3/3/9/133999953/zizop-rirujokijagat-rigitugu-jogamilod.pdfIn PDF document text
    • http://zathkatow.xyz/lost_vikings_2_snes_game_genie5y610.pdfIn PDF document text
    • http://dixajadabaw.66ghz.com/jigosokamakigi.pdfIn PDF document text
    • https://bulabameworiw.weebly.com/uploads/1/3/4/0/134096114/niradizekobu-tazivim-javageparaziki.pdfIn PDF document text
    • http://mon-cmso.best/drastic_ds_emulator_for_android_apkpure2g19u.pdfIn PDF document text
    • http://realnoe-obshenie.online/bhartiya_kala_ka_itihas_bookgcd5l.pdfIn PDF document text
    • http://instapriz365.online/ibm_data_power_tutorialf77y1.pdfIn PDF document text
    • http://fofafowazu.66ghz.com/lelujadunaf.pdfIn PDF document text
    • http://stroy-level.ru/24073739817etkkk.pdfIn PDF document text
    • http://begdas.fun/bizinitamini2ug.pdfIn PDF document text
    • http://lnstagramaccounts.com/wuragojaponuzenopj3fn.pdfIn PDF document text
    • http://instup.xyz/business_standard_newspaper_epaper1bja8.pdfIn PDF document text
    • https://wipasajumavadus.weebly.com/uploads/1/3/4/7/134775966/1244536.pdfIn PDF document text
    • http://instofficial.online/zenaxabpahb4.pdfIn PDF document text
    • http://prizinsta365.site/towefejiruxt92k.pdfIn PDF document text
    • http://milanomoda.site/zobevuk395yf.pdfIn PDF document text
    • http://cardio-active.site/accelerated_learning_techniques_for_students9m8dq.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://pejigevug.rf.gd/captive_portal_not_working_on_android.pdfIn PDF document text
    • http://topefanaxo.epizy.com/student_internship_contract_template.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_off0001047d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047D 5616 bytes
SHA-256: a274d60a774762c474e9f374ef650d240660ede6842a4f0c28c24a0b2b15adec
font_01_sfnt_off000117bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117BD 11212 bytes
SHA-256: 5d12dfb001c56efdf53d3ed9c9ea2b80f1f1cfff63c40336cfa700761a9d0d67
font_02_sfnt_off00013df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378